234 + Interview Questions in HEREDITY IN GENERAL AWARENESS Page 2 InterviewSolution

51.	What is the satellite?
Answer» Some of the chromosomes have an elongated knob-like appendage at one end of the chromosome known as the satellite.

Discussion

52.	If a pure tall pea plant is crossed with a pure dwarf plant, then in the first generation only tall plant appears. (a) What happens to the traits of the dwarf plant?(b) In the second generation, the dwarf trait reappears? Why?
Answer» (a) The tall plant (dominant) mask the expression of the dwarf plant. (b) When F₁ hybrids are self crossed, the two entities separate and then unite independently forming tall and dwarf plant.

52.

If a pure tall pea plant is crossed with a pure dwarf plant, then in the first generation only tall plant appears. (a) What happens to the traits of the dwarf plant?(b) In the second generation, the dwarf trait reappears? Why?

Answer»

(a) The tall plant (dominant) mask the expression of the dwarf plant.

(b) When F₁ hybrids are self crossed, the two entities separate and then unite independently forming tall and dwarf plant.

Discussion

53.	Name the types of chromosomes based on the position of centromere.
Answer» Based on the position of centromere, the chromosomes are classified as Telocentric, Aerocentric, submeta centric and meta centric.

Discussion

54.	How is the sex of a new born determines in humans?
Answer» The sperm produced by the father determines the sex of the child.

Discussion

55.	What is the mechanism behind the expression of a particular trait? Explain.
Answer» The factor for each character or trait remain independent and maintain their identity in the gametes. The factors are independent to each other and pass to the offspring through gametes.

Discussion

56.	What are chromosomes made up of?
Answer» Chromosomes are made up of DNA, RNA, chromosomal proteins (histones and non-histones) and certain metallic ions. These proteins provide structural support to the chromosome.

Discussion

57.	What is a mutation? Explain the two types of mutation.
Answer» The mutation is an inheritable sudden change in the genetic material (DNA) of an organism. Mutations are broadly classified into 1. Chromosomal mutation and 2. Gene mutation. 1. Chromosomal Mutation: The sudden change in the structure or number of chromosomes is called chromosomal mutation. This result in (a) Change in the structure of chromosomes: Structural changes occur due to errors in cell division. Changes in the number and arrangement of genes take place as a result of deletion, duplication, inversion and translocation in chromosomes. (b) Changes in the number of chromosomes: They involve addition or deletion in the number of chromosomes present in a cell and is called ploidy. The two types of ploidy are: (i) Euploidy: It is the condition, in which the individual bears more than the usual number. If an individual has three haploid sets of chromosomes, the condition is called triploidy [3n]. Triploid plants and animals are sterile. If an individual has four haploid sets of chromosomes, the condition is called tetraploidy [4n], Tetraploid plants often result in increased fruit and flower size. (ii) Aneuploidy: It is the loss or gain of one or more chromosomes in a set. It is of three types: Monosomy [2n – 1] Trisomy [2n + 1] Nullisomy [2n – 2] (iii) Down’s syndrome: It is one of the commonly known aneuploid condition, in man. It is a genetic condition, in which there is an extra copy of chromosome 21 (Trisomy 21). It is associated with mental retardation, delayed development, behavioural problems, weak muscle tone, vision and hearing disability are some of the conditions seen in children. 2. Gene or point mutation: Gene mutation is the changes occurring in the nucleotide sequence of a gene. It involves substitution, deletion, insertion or inversion of a single or more than one nitrogenous base. Gene alteration results in abnormal protein formation.

57.

What is a mutation? Explain the two types of mutation.

Answer»

The mutation is an inheritable sudden change in the genetic material (DNA) of an organism.

Mutations are broadly classified into

1. Chromosomal mutation and

2. Gene mutation.

1. Chromosomal Mutation: The sudden change in the structure or number of chromosomes is called chromosomal mutation. This result in

(a) Change in the structure of chromosomes: Structural changes occur due to errors in cell division. Changes in the number and arrangement of genes take place as a result of deletion, duplication, inversion and translocation in chromosomes.

(b) Changes in the number of chromosomes: They involve addition or deletion in the number of chromosomes present in a cell and is called ploidy.

The two types of ploidy are:

(i) Euploidy: It is the condition, in which the individual bears more than the usual number. If an individual has three haploid sets of chromosomes, the condition is called triploidy [3n]. Triploid plants and animals are sterile. If an individual has four haploid sets of chromosomes, the condition is called tetraploidy [4n], Tetraploid plants often result in increased fruit and flower size.

(ii) Aneuploidy: It is the loss or gain of one or more chromosomes in a set.

It is of three types:

Monosomy [2n – 1]
Trisomy [2n + 1]
Nullisomy [2n – 2]

(iii) Down’s syndrome: It is one of the commonly known aneuploid condition, in man. It is a genetic condition, in which there is an extra copy of chromosome 21 (Trisomy 21). It is associated with mental retardation, delayed development, behavioural problems, weak muscle tone, vision and hearing disability are some of the conditions seen in children.

2. Gene or point mutation: Gene mutation is the changes occurring in the nucleotide sequence of a gene. It involves substitution, deletion, insertion or inversion of a single or more than one nitrogenous base. Gene alteration results in abnormal protein formation.

Discussion

58.	How are Mutation classified? Explain.
Answer» Mutations are classified into two main types, namely chromosomal mutation and gene mutation. Chromosomal mutation: The sudden change in the structure or number of chromosomes is called a chromosomal mutation. This may result in (i) Changes in the structure of chromosomes: Structural changes in the chromosomes usually occurs due to errors in cell division. Changes in the number and arrangement of genes take place as a result of deletion, duplication, inversion and translocation in chromosomes. (ii) Changes in the number of chromosomes: They involve addition or deletion in the number of chromosomes present in a cell. This is called ploidy. There are two types of ploidy (a) Euploidy (b) Aneuploidy. Gene or point mutation: Gene mutation is the changes occurring in the nucleotide sequence of a gene. It involves substitution, deletion, insertion or inversion of a single or more than one nitrogenous base. Gene alteration results in abnormal protein formation in an organism

58.

How are Mutation classified? Explain.

Answer»

Mutations are classified into two main types, namely chromosomal mutation and gene mutation.

Chromosomal mutation:

The sudden change in the structure or number of chromosomes is called a chromosomal mutation. This may result in

(i) Changes in the structure of chromosomes: Structural changes in the chromosomes usually occurs due to errors in cell division. Changes in the number and arrangement of genes take place as a result of deletion, duplication, inversion and translocation in chromosomes.

(ii) Changes in the number of chromosomes: They involve addition or deletion in the number of chromosomes present in a cell. This is called ploidy. There are two types of ploidy

(a) Euploidy

(b) Aneuploidy.

Gene or point mutation: Gene mutation is the changes occurring in the nucleotide sequence of a gene. It involves substitution, deletion, insertion or inversion of a single or more than one nitrogenous base. Gene alteration results in abnormal protein formation in an organism

Discussion

59.	Explain the types of chromosome-based on function.
Answer» Based on function, the chromosomes are classified into: 1. Autosomes: Autosomes contain genes that determine the somatic (body) characters. Male and female have an equal number of autosomes. 2. Allosomes: Allosomes are responsible for determining the sex of an individual. They are also called sex chromosomes or heterochromosomes. There are two types of sex chromosomes. The human male has one X chromosome and one Y chromosome and human female have two X chromosomes.

59.

Explain the types of chromosome-based on function.

Answer»

Based on function, the chromosomes are classified into:

1. Autosomes: Autosomes contain genes that determine the somatic (body) characters. Male and female have an equal number of autosomes.

2. Allosomes: Allosomes are responsible for determining the sex of an individual. They are also called sex chromosomes or heterochromosomes. There are two types of sex chromosomes.

The human male has one X chromosome and one Y chromosome and human female have two X chromosomes.

Discussion

60.	The process of transmission of varied characters to offspring from parents A) Inheritance B) Mutations C) Diversity D) Environment
Answer» (A) Inheritance

Discussion

61.	The book “Principles of Geology” was written by A) Charles DarwinB) Charles Lyell C) Malthus D) J.B. Lamarck
Answer» (B) Charles Lyell

Discussion

62.	Who wrote the book “principles of geology” of evolution?
Answer» The book “principles of geology” of evolution was written by Charles Lyell.

Discussion

63.	Reason for dying of red colour beetles and increase of green coloured beetles ………. A) Green beetles have more resistance B) Less life time in red coloured beetles C) Variation in the colour D) Crows like red coloured beetles
Answer» (C) Variation in the colour

Discussion

64.	The age of fossils is determined by calculating the half life period of A) Isobars B) Isotopes C) Radio activitiy D) Carbon dating
Answer» (D) Carbon dating

Discussion

65.	What are vestigial organs?
Answer» Organs which are not useful in animal are called vestigial organs.

Discussion

66.	The long plants always produce long plants only A) Yes B) No C) Can’t say D) Short plants also produced
Answer» (D) Short plants also produced

Discussion

67.	According to Mendel, for one character there is a pair of A) Traits B) Factors C) Genes D) Homozygous
Answer» According to Mendel, for one character there is a pair of Factors

Discussion

68.	Which of the following statements is incorrect ? A) Forelimbs of a whale, wings of a bat, legs of a cheetah, hands of a man are the examples of homologous organs. B) The study of fossils is called paleontology. C) Embryology is the study of the development of an organism from egg to adult. D) There are nearly 150 vestigial organs in human beings.
Answer» C) Embryology is the study of the development of an organism from egg to adult. c) embryology is the study of the development of an organism from egg to adult.

Discussion

69.	The method of determining the age of fossils. A) Potassium dating B) Radium dating C) Carbon dating D) Uranium dating
Answer» (C) Carbon dating

Discussion

70.	The wings of bats have skin folds stretched between elongated fingers is called……… A) Adipose B) Patagium C) Blupper D) Malphigium
Answer» (B) Patagium

Discussion

71.	Express your opinion about the use of DNA fingerprinting.
Answer» DNA fingerprinting is the technique in which the sequence of the genes in the DNA of a person, i.e., the genome of the person is identified. This technique is useful to identify the lineage and to identify criminals because it is unique to every person. It is also useful to identify paternity and maternity disputes etc. This technique was developed by Professor of genetics Sir Alec Jeffreys. A common method of collecting a reference sample, is in the use of a buccal swab. If this is not available, blood or saliva or hair sample may be used. Just like your actual fingerprint, your DNA fingerprint is something that you are born with. It is unique to you. DNA fingerprint is very useful in forensic science.

Discussion

72.	The fly on which Morgan experimented ………A) Musca Domestica B) Apis Meliphera C) Oenotheora D) Drosophila Melanogastor
Answer» D) Drosophila Melanogastor

Discussion

73.	Which of the following statement(s) is (are) true about human evolution ? A) All humans are a single species the Homo sapiens. B) Skin colour is the most common way of identifying the races. C) The genetic foot prints of humans, (Homo sapiens), show that all human beings have evolved D) All the above
Answer» D) All the above

Discussion

74.	What is human evolution?
Answer» Human evolution is the evolutionary process leading upto the appearance of modern human beings.

Discussion

75.	Write a monologue on the evolution of a human to perform a stage show on the theatre day in your school.
Answer» 1. Hai, I am a human being. I am going to recall what had happened to me so far, how I had evolved, simply my journey from my origin to till now. 2. Nearly 1.6 – 2.5 million years ago, during the gelasian pleistocene period, I used to wander in the forest. It is belived that, I evolved from apes. 3. Between 1-1.8 million years ago, I gradually evolved into Homo erectus. I lived in this stage throughout most of the pleistocene. I used more diverse and sophisticated stone tools than my predecessors and it is belived that I travelled over oceans using rafts. 4. Around 1,00,000 – 40,000 thousand years ago I evolved into Homo sapiens neanderthalensis. I was stronger than present in those days. I made advanced tools. I had language to communicate. 5. Around 40 thousand years ago, I reached the present form of human being, the modern humans known as Homo sapiens. I learnt cultivation, construction of houses, cooking, etc. I had invented various things that help me to live comfortably. 6. But my journey did not stop. It is still continuing. Let us see what may happen? Where can I reach? What changes may come in me? Hope for the best. Thank you.

75.

Write a monologue on the evolution of a human to perform a stage show on the theatre day in your school.

Answer»

1. Hai, I am a human being. I am going to recall what had happened to me so far, how I had evolved, simply my journey from my origin to till now.

2. Nearly 1.6 – 2.5 million years ago, during the gelasian pleistocene period, I used to wander in the forest. It is belived that, I evolved from apes.

3. Between 1-1.8 million years ago, I gradually evolved into Homo erectus. I lived in this stage throughout most of the pleistocene. I used more diverse and sophisticated stone tools than my predecessors and it is belived that I travelled over oceans using rafts.

4. Around 1,00,000 – 40,000 thousand years ago I evolved into Homo sapiens neanderthalensis. I was stronger than present in those days. I made advanced tools. I had language to communicate.

5. Around 40 thousand years ago, I reached the present form of human being, the modern humans known as Homo sapiens. I learnt cultivation, construction of houses, cooking, etc. I had invented various things that help me to live comfortably.

6. But my journey did not stop. It is still continuing. Let us see what may happen? Where can I reach? What changes may come in me? Hope for the best. Thank you.

Discussion

76.	Raju’s chromosomes are 44 + XY and his wife Rani’s chromosomes are 44 + XX. Then their first male child will have these chromosomes A) 44 + XX B) 22 + XXC) 44 + XY D) 44 + YY
Answer» Answer is (C) 44 + XY

Discussion

77.	The structure of ,DNA is ……….. A) SphericalB) Double helix C) Straight D) Circular
Answer» (B) Double helix

Discussion

78.	In human beings DNA controls the characters whereas in viruses ……….. controls the character. A) RNA B) ABA C) Synthetic DNA D) Retro RNA
Answer» Answer is (A) RNA

Discussion

79.	Girl: XX Chromosomes :: Boy:……A) XY Chromosomes B) LX Chromosomes C) XL Chromosomes D) XX Chromosomes
Answer» (A) XY Chromosomes

Discussion

80.	During the following, variation occurs. i) During reproduction ii) Changes in DNA transcription iii) Changes in RNA transcription iv) Synthesis of protein A) i, ii, iii only B) i only C) i and ii only D) i and iv only
Answer» C) i and ii only

Discussion

81.	Which of the following is not a variation in rose plant ? A) Coloured petals B) Spines C) Tendrils D) Leaf margin
Answer» Answer is (C) Tendrils

Discussion

82.	Why man is called a moving museum of vestigial organs?
Answer» 1. The organs which are not useful in animals are called ‘vestigial organs’. There are nearly 180 vestigial organs in human beings, 2. Hence, human being is said to be a moving museum of vestigial organs.

82.

Why man is called a moving museum of vestigial organs?

Answer»

1. The organs which are not useful in animals are called ‘vestigial organs’. There are nearly 180 vestigial organs in human beings,

2. Hence, human being is said to be a moving museum of vestigial organs.

Discussion

83.	Passing of characters from parents to off springs is called A) Heredity B) Natural selection C) Variations D) Acquired characters
Answer» Passing of characters from parents to off springs is called Heredity

Discussion

84.	State whether the following statements are true or false. Correct the false statement:1. During gamete formation, in Pj generation the pair of gametes separate independently.2. Down syndrome is caused due to monosomy of X chromosome.3. In Klinefelter syndrome, women are sterile.4. If the father and mother are both sufferers or carriers of sickle-cell anaemia, their off springs are likely to suffer from this disease.5. During fertilization, mitochondria is contributed by the sperm cell and egg cell(ovum).
Answer» 1. True 2. False. Down syndrome is caused due to trisomy of 21^st chromosome. 3. False. In Klinefelter syndrome, men are sterile as this disorder arises in men due to abnormality in sex chromosome. 4. True 5. False. During fertilization, mitochondria is contributed by the egg cell (ovum) alone.

84.

State whether the following statements are true or false. Correct the false statement:1. During gamete formation, in Pj generation the pair of gametes separate independently.2. Down syndrome is caused due to monosomy of X chromosome.3. In Klinefelter syndrome, women are sterile.4. If the father and mother are both sufferers or carriers of sickle-cell anaemia, their off springs are likely to suffer from this disease.5. During fertilization, mitochondria is contributed by the sperm cell and egg cell(ovum).

Answer»

1. True

2. False. Down syndrome is caused due to trisomy of 21^st chromosome.

3. False. In Klinefelter syndrome, men are sterile as this disorder arises in men due to abnormality in sex chromosome.

4. True

5. False. During fertilization, mitochondria is contributed by the egg cell (ovum) alone.

Discussion

85.	Define the term Archeopteryx?
Answer» Archeopteryx is recognised as connecting link between Aves and reptiles.

Discussion

86.	Passing of traits independently is known as ……… A) Law of Dominance B) Law of Segregation C) Formula of Gene factor D) Law of Independent Assortment
Answer» (D) Law of Independent Assortment

Discussion

87.	The law which states that “Among two factors, one is passed to or expressed in the progeny” is called ……… A) Law of Dominance B) Law of Segregation C) Formula of Gene factor D) Law of Independent assortment
Answer» (A) Law of Dominance

Discussion

88.	what is called palaeontology?
Answer» The study of fossils is called palaeontology.

Discussion

89.	How palaeontologists determine the age of fossil?
Answer» Palaeontologists determine the age of fossil by using carbon dating method.

Discussion

90.	What is Palaeontology?
Answer» The study of fossil is called Palaeontology.

Discussion

91.	What is heritable traits?
Answer» Traits that may be passed from one generation to the next are called heritable traits.

Discussion

92.	The scientist who defined the Heredity basing on the Giraffe ……A) Charles Darwin B) Lamarck C) William Harvey D) Beagle
Answer» The scientist who defined the Heredity basing on the Giraffe Lamarck

Discussion

93.	Give definition of Palaeontology.
Answer» Palaeontology: The study of fossils is called Palaeontology.

Discussion

94.	Natural selection means A) Nature selects desirable characters B) Nature rejects undesirable characters C) Nature reacts with an organism D) A and B
Answer» Answer is (D) A and B

Discussion

95.	What are heritable traits?
Answer» Traits that may be passed on from one generation to the next are called as heritable traits.

Discussion

96.	What is heredity?
Answer» Transmission or passing of characters or traits from parent to offspring is called Heredity.

Discussion

97.	Vestigial organs.
Answer» Vestigial organs: The organs which are not useful in animals are called vestigial organs.

Discussion

98.	The double helix structure of DNA was discovered by?
Answer» James Watson and Francis Crick discovered the double helix structure of DNA.

Discussion

99.	Explain gene in one sentence.
Answer» Gene is a segment of a nucleic acid called DNA which is present in the nucleus of every cell.

Discussion

100.	What are Mendel’s laws of inheritance? What are the reasons to choose pea plant for his experiment?
Answer» Mendel’s Laws of inheritance: 1. Law of Dominance : Among a pair of closely related ‘alleles’ or factors, only one expresses itself. In the first generation as one of the allele is dominant over the other. This is called as Mendel’s Law of dominance. 2. Law of Segregation : The law of segregation states that every individual possesses a pair of alleles for any particular trait that each parent posses a randomly selected copy only one of these to its off-spring. 3. Law of Independent assortment : In the inheritance of more than one pair of characters (traits), the factors for each pair of characters assort independently of the other pairs. This is known as ‘Law of Independent assortment’. Mendel has chosen garden pea as material for his experiment because: 1. It has well developed characters. 2. It is a bisexual flower. 3. Predominently self pollinating. 4. Suitable for cross pollination. 5. It is an annual plant. -Between 1856-1863, Mendel conducted the hybridization experiments on the garden peas. During that period, he chose some distinct characteristics of the peas and conducted some cross-pollination/ artificial pollination on the pea lines that showed stable trait inheritance and underwent continuous self-pollination. Such pea lines are called true-breeding pea lines. -Mendel experimented on a pea plant and considered 7 main contrasting traits in the plants. Then, he conducted both the experiments to determine the aforementioned inheritance laws. -He selected a pea plant for his experiments: •The pea plant can be easily grown and maintained. •They are naturally self-pollinating but can also be cross-pollinated. •It is an annual plant, therefore, many generations can be studied within a short period of time. It has several contrasting characters. -Mendel conducted 2 main experiments to determine the laws of inheritance. These experiments were: •Monohybrid Cross Experiment •Dihybrid Cross Experiment -While experimenting, Mendel found that certain factors were always being transferred down to the offspring in a stable way. Those factors are now called genes i.e. genes can be called the units of inheritance.

100.

What are Mendel’s laws of inheritance? What are the reasons to choose pea plant for his experiment?

Answer»

Mendel’s Laws of inheritance:

1. Law of Dominance : Among a pair of closely related ‘alleles’ or factors, only one expresses itself. In the first generation as one of the allele is dominant over the other. This is called as Mendel’s Law of dominance.

2. Law of Segregation : The law of segregation states that every individual possesses a pair of alleles for any particular trait that each parent posses a randomly selected copy only one of these to its off-spring.

3. Law of Independent assortment : In the inheritance of more than one pair of characters (traits), the factors for each pair of characters assort independently of the other pairs. This is known as ‘Law of Independent assortment’.

Mendel has chosen garden pea as material for his experiment because:

1. It has well developed characters.

2. It is a bisexual flower.

3. Predominently self pollinating.

4. Suitable for cross pollination.

5. It is an annual plant.

-Between 1856-1863, Mendel conducted the hybridization experiments on the garden peas. During that period, he chose some distinct characteristics of the peas and conducted some cross-pollination/ artificial pollination on the pea lines that showed stable trait inheritance and underwent continuous self-pollination. Such pea lines are called true-breeding pea lines.

-Mendel experimented on a pea plant and considered 7 main contrasting traits in the plants. Then, he conducted both the experiments to determine the aforementioned inheritance laws.

-He selected a pea plant for his experiments:

•The pea plant can be easily grown and maintained.

•They are naturally self-pollinating but can also be cross-pollinated.

•It is an annual plant, therefore, many generations can be studied within a short period of time.

It has several contrasting characters.

-Mendel conducted 2 main experiments to determine the laws of inheritance. These experiments were:

•Monohybrid Cross Experiment

•Dihybrid Cross Experiment

-While experimenting, Mendel found that certain factors were always being transferred down to the offspring in a stable way. Those factors are now called genes i.e. genes can be called the units of inheritance.

Discussion

Explore topic-wise InterviewSolutions in .

What is the satellite?

If a pure tall pea plant is crossed with a pure dwarf plant, then in the first generation only tall plant appears. (a) What happens to the traits of the dwarf plant?(b) In the second generation, the dwarf trait reappears? Why?

Name the types of chromosomes based on the position of centromere.

How is the sex of a new born determines in humans?

What is the mechanism behind the expression of a particular trait? Explain.

What are chromosomes made up of?

What is a mutation? Explain the two types of mutation.

How are Mutation classified? Explain.

Explain the types of chromosome-based on function.

The process of transmission of varied characters to offspring from parents A) Inheritance B) Mutations C) Diversity D) Environment

The book “Principles of Geology” was written by A) Charles DarwinB) Charles Lyell C) Malthus D) J.B. Lamarck

Who wrote the book “principles of geology” of evolution?

Reason for dying of red colour beetles and increase of green coloured beetles ………. A) Green beetles have more resistance B) Less life time in red coloured beetles C) Variation in the colour D) Crows like red coloured beetles

The age of fossils is determined by calculating the half life period of A) Isobars B) Isotopes C) Radio activitiy D) Carbon dating

What are vestigial organs?

The long plants always produce long plants only A) Yes B) No C) Can’t say D) Short plants also produced

According to Mendel, for one character there is a pair of A) Traits B) Factors C) Genes D) Homozygous

The method of determining the age of fossils. A) Potassium dating B) Radium dating C) Carbon dating D) Uranium dating

The wings of bats have skin folds stretched between elongated fingers is called……… A) Adipose B) Patagium C) Blupper D) Malphigium

Express your opinion about the use of DNA fingerprinting.

The fly on which Morgan experimented ………A) Musca Domestica B) Apis Meliphera C) Oenotheora D) Drosophila Melanogastor

What is human evolution?

Write a monologue on the evolution of a human to perform a stage show on the theatre day in your school.

Raju’s chromosomes are 44 + XY and his wife Rani’s chromosomes are 44 + XX. Then their first male child will have these chromosomes A) 44 + XX B) 22 + XXC) 44 + XY D) 44 + YY

The structure of ,DNA is ……….. A) SphericalB) Double helix C) Straight D) Circular

In human beings DNA controls the characters whereas in viruses ……….. controls the character. A) RNA B) ABA C) Synthetic DNA D) Retro RNA

Girl: XX Chromosomes :: Boy:……A) XY Chromosomes B) LX Chromosomes C) XL Chromosomes D) XX Chromosomes

During the following, variation occurs. i) During reproduction ii) Changes in DNA transcription iii) Changes in RNA transcription iv) Synthesis of protein A) i, ii, iii only B) i only C) i and ii only D) i and iv only

Which of the following is not a variation in rose plant ? A) Coloured petals B) Spines C) Tendrils D) Leaf margin

Why man is called a moving museum of vestigial organs?

Passing of characters from parents to off springs is called A) Heredity B) Natural selection C) Variations D) Acquired characters

Define the term Archeopteryx?

Passing of traits independently is known as ……… A) Law of Dominance B) Law of Segregation C) Formula of Gene factor D) Law of Independent Assortment

The law which states that “Among two factors, one is passed to or expressed in the progeny” is called ……… A) Law of Dominance B) Law of Segregation C) Formula of Gene factor D) Law of Independent assortment

what is called palaeontology?

How palaeontologists determine the age of fossil?

What is Palaeontology?

What is heritable traits?

The scientist who defined the Heredity basing on the Giraffe ……A) Charles Darwin B) Lamarck C) William Harvey D) Beagle

Give definition of Palaeontology.

Natural selection means A) Nature selects desirable characters B) Nature rejects undesirable characters C) Nature reacts with an organism D) A and B

What are heritable traits?

What is heredity?

Vestigial organs.

The double helix structure of DNA was discovered by?

Explain gene in one sentence.

What are Mendel’s laws of inheritance? What are the reasons to choose pea plant for his experiment?