687 + Interview Questions in PRINCIPLES-OF-INHERITANCE-AND-VARIATION IN GENERAL AWARENESS Page 2 InterviewSolution

51.	A normal woman whose father was colour blind, is married to a normal man. The sons would beA. 75% colour blindB. 50% colour blindC. all normalD. all colour blind
Answer» Correct Answer - B

Discussion

52.	A normal woman, whose father was colour blind is married to a normal man. The sons would beA. `75%` colour blindB. `50%` colour blindC. All normalD. All colour blind
Answer» Correct Answer - B

Discussion

53.	The polytene chromosomes were discovered for the first time inA. ChrinomusB. FruitflyC. DrosophilaD. House fly
Answer» Correct Answer - A (a) Polytene chromosomes were first observed in the salivary glands of Chironomous larva and hence called salivary gland chrom.

Discussion

54.	Crossing overt takes palace at a stage betweenA. Letotone and dipoteneB. Pachytene and diploteneC. Zygotene and pachyteneD. Zygotene and diplotene
Answer» Correct Answer - B (b) The crossing overs occurs in the homologous chromosomes only during the four stranded or tetrad stage in between pachytene and diplotene phase of meiosis.

Discussion

55.	Genes which are cofined to differential region of the Y-chromosome only are called :A. MutantB. AutosomalC. HolndricD. Completely sex-linked
Answer» Correct Answer - C (c) The genes present on the differential part of Y chromosome are passed directly from father to son and are called as Holandric genes .

Discussion

56.	Genes located on differential region of Y-chromosome are calledA. XY linked genesB. Holandric genseC. Autosomal genesD. Mutant genes
Answer» Correct Answer - B Genes located on differential region of Y-chromosome are called holandric genes.

Discussion

57.	The genes, which remains confined to differential region of Y-chromosome, areA. Autosomal genesB. Holandric genesC. Corpletely sex-linked genesD. Mutant genes
Answer» Correct Answer - B

Discussion

58.	Mental retardation in man, associated with sex chromosomal abnormality is usually due toA. Reduction in X complementB. Increase in X complementC. Moderate increase in Y complementD. Large increase in Y complement
Answer» Correct Answer - B

Discussion

59.	If recombination frequency between AB genes a `20%` and `BC` gene is `40%` and interference is `30%` in the case of double cross over than what will be coincidance under this condition ?A. 2.4B. 8C. 5.6D. 0.7
Answer» Correct Answer - D

Discussion

60.	Two linked genes a nad b show 20% recombination the indivsuls of a hybrid cross between ++/++ X ab/ab shaoll show gemetes:A. `+ +80 :ab : 20`B. `+ +50 : ab : 50`C. `+ + 40 : ab 40 : + a 10 : + b : 10`D. `+ + 30 : ab 30 : + a 20 : + b : 20`
Answer» Correct Answer - C The gametes of a dihybrid cross between `+ +//+ + xx ab//ab` will be + + 40 : ab40 : +a10 : + b : 10

Discussion

61.	Aassertion : In humans , most sex-lineked genes are present on the X chromosome. Reason : Human chromosome contains a large number of genes with major effects on phenotype.A. If both the assertion and the reason are true and the reasons is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reson is falseD. If both the assertion and reason are false
Answer» Correct Answer - A Most sex-linked genes in male heterogametic animals are present on the X-chromosome. Some animals, however may carry a few genes on the Y chromosome that produce visible effects on the phenotype of the organism. Y linkage is very rare in higher animal particularly mammals. X linkage on the other hand is very common in all mammals that have been studied, the mammalian X chromosome contains a studied, the mammalian X chromosome contains a larger number of genes with major effects on phenotype.

Discussion

62.	Chromosomes complement with 2n-1 is calle asA. MonosomyB. NullosomyC. TrisomyD. Tetrasomy
Answer» Correct Answer - A

Discussion

63.	Match the following - (w.r.t. Pedigree analysis ) A. `a(iv), b(ii), c(ii), d(i)`B. `a(ii), b(iii), c(iv), d(i)`C. `a(iii), b(iv), c(ii), d(i)`D. `a(i), b(ii), c(iv), d(iii)`
Answer» Correct Answer - C

Discussion

64.	Which is incorrect regarding pedigree analysis?A. It helps to unerstand whether the trait in question is dominant or recessive.B. It confirms that the trait is linked to one of the autosome.C. It helps to trace the inheritance of a specific trait.D. It confirms that DNA is the carrier of genetic information.
Answer» Correct Answer - D It does not confirms that DNA is the carrier of genetic information.

Discussion

65.	Study the pedigree chart given below :- What does it show :-A. Inheritance of a condition like phenylketonuria as an autosomal recessive traitB. The pedigree chart is wrong as this is not possibleC. Inheritance of a recessive sex-linked disease like haemophiliaD. Inheritance of a sex-linked inborn error of metabolism like phenylketonuria
Answer» Correct Answer - A

Discussion

66.	Study the pedigree chart given below : What does it knowA. Inheritance of a condition like phenylketonuria as an autosomal recessive trait.B. The pedigree chart is wrong as this is not possibleC. Inheritance of a recessive sex-linked diseases line haemophiliaD. Inheritance of sex-linked inborn error of metabolism like phenylketonuria.
Answer» Correct Answer - A

Discussion

67.	Study the pedigree chart given below What does its showA. Inheritance of a sex-linked inborn error of metabolism like phenylketonuriaB. Inheritance of a condition like phenylketonuria as an autosomal recessive traitC. The pedigree chart is wrong as this is not possibleD. Inheritance of a recessive sex-linked disease like haemophilia
Answer» Correct Answer - D In the given pedigree chart, squares are representing males and circles females. In `F_(1)`-generation, 1-male and 1-female are diseased and in next generation only male is diseased. This shows the inheritance of a recessive sex-linked diseases like haemophilia.

Discussion

68.	Gane for colour blindness is located onA. Homologous part X- chroosomeB. Non - Homologous part of X- chromosomeC. Homologous part of Y -chromosomeD. Non -homologous part of Y-chromosome
Answer» Correct Answer - B (b) Gene for colour blindness is located on the nonhomologous part of X-Chromose .It I ssex linked recessive .

Discussion

69.	Study the pedigree chart given below What does its showA. Inheritance of a sex-linked inborn error of metabolism like phenylketonuriaB. Inheritance of a condition like phenylketonuria as an autosomal recessive traitC. The pedigree chart is wrong as this is not possibleD. Inheritance of a recessive sex-linked disease like haemophilia
Answer» Correct Answer - B

Discussion

70.	Phenotypic ratio of dihybrid test cross is:A. `9:3:3:1`B. `15:1`C. `9:6:1`D. `1:2:1`
Answer» Correct Answer - A Phenotypic dihybrid ratio is `9:3:3:1`.

Discussion

71.	Select the correct statements from the ones given below with respect to dihybrid crossA. Tightly liked genes on the same chromosome show very few recombinationsB. Tightly linked genes on the same chromosome show higher recombinationsC. Genes far apart on the same chromosome show vary few recombinationsD. Genes loosely linked on the same chromosome show similar recombinations as the tightly linked ones
Answer» Correct Answer - A

Discussion

72.	When two odd characters are present in a gane ,this is known asA. BigamousB. HeterozygousC. PlymorphiocD. Heteromorphic
Answer» Correct Answer - B

Discussion

73.	A man a inherit his X chromosome fromA. His maternal grand mother or maternal grand fatherB. His fatherC. His maternal grand father onlyD. His paternal grand father
Answer» Correct Answer - A

Discussion

74.	Percentage of recombination between A and B is 9% and C is 17%. B and C is 26%, then the arrangement of genes isA. A-B-CB. A-C-BC. B-C-AD. B-A-C
Answer» Correct Answer - D

Discussion

75.	If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease isA. Autosomal recessiveB. Autosomal dominantC. Sex-linked recessiveD. Sex-linked dominant.
Answer» Correct Answer - C It is evident that X-linked recessive trait shows transmission from carrier female to male progeny.

Discussion

76.	The terms cistron, recon and muton were proposed byA. W. IngramB. BastesonC. J. LederbergD. S. Benzer
Answer» Correct Answer - D (d) Cistron , muton and recon were given by Seymour Benzer to explain the relation between DNA length and gene .

Discussion

77.	A cross between pure tall Pea plant with green pods and dwarf Pea Plant with yellow pods will produce short `F_(2)` plant out of 16A. 9B. 3C. 4D. 1
Answer» Correct Answer - C This is an example of dihybrid cross because two characters are being studied simultaneously in which dwarfness is a recessive characters, so in `F_(2)`-generation 4 plants will be dwarf out of 16.

Discussion

78.	During a mohohybrid cross involving a tall pea plant with a dwarf pea plant, the offspring populations were tall and dwarf in equal ratio. Work out a cross to show how it is possible.
Answer» It is an example of test cross. It is possible when heterozygous tall pea plant (Tt) is croosed with dwarf pea plant

Discussion

79.	Lathyrus odoratus is an example of which of the following genesA. Supplementry genesB. Complementry genesC. Lethel genesD. Condominant genes
Answer» Correct Answer - B (b) `underset(White)("CCpp")underset(Red)underset(CcPp)underset(darr)xxunderset(White)"ccPP"` In complementary gene action, 9:7 ratio is obtained in `F_(2)` in which two dominant genes are responsible for red flower colour.

Discussion

80.	A teachers wants his/her students to find the genotypes of pea plants bearing purple coloured flowers in their school garden. Name and explain the cross that will make it possible.
Answer» The genotype of pea plants beraing purple flowers can be determined with the help of test cross. For details.

Discussion

81.	Which of the following genotypes of sweet pea plant is related with the production of purple coloured flowersA. CcPpB. `"CCpp"`C. `"ccPP"`D. `Ccpp`
Answer» Correct Answer - A

Discussion

82.	Sex chromosomes of a female bird are represented byA. XOB. XXC. XYD. ZW
Answer» Correct Answer - D

Discussion

83.	Genes present in the cytoplasm of eukaryotic cells, are found inA. Mitochondri and inherited viva egg cytoplasmB. Lysosomes and peroxisomesC. Golgi bodies and smooth endoplasmic reticulumD. Plasitds and inherited via male gamete
Answer» Correct Answer - A

Discussion

84.	The theory where ratio between the number of X_ chromosomes and number of complete sets of autosomes will determine the sex is known asA. Chromosome theory of sex determinationB. Genic balance theory of sex determinationC. Hormonal balance theory of sex determinationD. Environmental sex determination theory
Answer» Correct Answer - B

Discussion

85.	Chromosomes that determine male sex in Melandrium plant isA. Y chromosomeB. X chromosomeC. XX chromosomeD. None of these
Answer» Correct Answer - A

Discussion

86.	In slpit genes, the coding sequences are calledA. Cistrons0B. OperonsC. ExonsD. Introns
Answer» Correct Answer - C (c) Unwanted portion (introns ) of genes is spliced off and remaining part i.e., exons get joined by ligase .

Discussion

87.	The eukaryotic Chromosomes are made up ofA. DNAB. RNAC. DNA and proteinsD. DNA and lipids
Answer» Correct Answer - C (c) DNA and proteins (Polynucleotides and histone proteins ) .

Discussion

88.	The colour based contrasting traits in seven contrasting pairs, studied by Mendel in pea plant wereA. 1B. 2C. 3D. 4
Answer» Correct Answer - C

Discussion

89.	A : Mendel gave postulates like "principles of segregation and principles of independent assortment" after studying seven pairs of contrasting traits in garden pea. R : He was lucky in selecting seven characters in pea that were located on seven different chromosomes.A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)B. If both Assertion & Reason are true and the reason is not the correct explanation of the assertion , then mark (2)C. If Assertion is true statement but Reason is false, then mark (3)D. If both Assertion and Reason are false statements, then mark (4)
Answer» Correct Answer - C

Discussion

90.	On selfing a plant of `F_(1)`-generation with genotype "AABbCC", the genotypic ratio in `F_(2)` generation will beA. `1:2:1`B. `1:1`C. `9:3:3:1`D. `27:9:9:9:3:3:3:1`
Answer» Correct Answer - A

Discussion

91.	A diplod organism is heteroxygous for 4 loci, how many typs of gametes can be produced ?
Answer» If a diploid organism is heteroxygous for 4 foci, it will produced 16 types of gametes. This number is calculated by using the formula `2^(n)` where n is the number of loci, i.e.,... `2^(4)` means `2xx2xx2xx2=16`

Discussion

92.	Briefly mention the contribution of T.H. Morgan in genetics.
Answer» Morgan’s work is based on fruit flies (Drosophila melanogaster). He formulated the chromosomal theory of linkage. He defined linkage as the co-existence of two or more genes in the same chromosome and performed dihybrid crosses in Drosophila to show that linked genes are inherited together and are located on X-chromosome. His experiments have also proved that tightly linked genes show very low recombination while loosely linked genes show higher recombination.

Discussion

93.	A diploid organism is heterozygous for five loci and homozygous for 2 loci , how many types of gametes can be produced ?A. 128B. 32C. 4D. 14
Answer» Correct Answer - B

Discussion

94.	How many types of gametes can be produced by a diploid organisms, if it is heterozygous for 3 loci?A. 6B. 4C. 8D. 3
Answer» Correct Answer - C

Discussion

95.	The number of linkage group (s) present In Escherichia Coli is :A. 1B. 2C. 3D. 7
Answer» Correct Answer - A

Discussion

96.	The segeration of paired herditary factors that Mendal postulated occures duringA. Anaphase of first meiotic divisionB. Metaphase of second meitoc divisionsC. During interphase between two meiotic divisonsD. Prophase of fistmeiotic division
Answer» Correct Answer - A (A) Anaphase divides the paired hereditary factors into two equal and simlar haves.

Discussion

97.	Which of the following is incorrectly pairedA. Sry gene X chromosomeB. 2n-2-nullisomicC. Nucleiod prokaryoteD. Polytecnic
Answer» Correct Answer - A

Discussion

98.	Mark the odd one (w.r.t dominant trait in garden pea)A. Yellow podB. Inflated podC. Axial flowerD. Yellow seed
Answer» Correct Answer - A

Discussion

99.	In Pisum sativum there are 14 Chromosomes. How many paris with different chromosomal composition can be preparedA. 14B. 7C. `2^(14)`D. `2^(7)`
Answer» Correct Answer - D

Discussion

100.	Which of the following is not a correct dominant-recessive trait pairs of Pisum sativum?A. Axial-terminal flower position, Tall - dwarf stem heightB. Yellow-green pod colour, round - wrinkled seed shapeC. Full-constricted pod shape, Yellow- green seed colourD. Violet -white flower colour, Inflated - constricted
Answer» Correct Answer - B

Discussion

Explore topic-wise InterviewSolutions in .

A normal woman whose father was colour blind, is married to a normal man. The sons would beA. 75% colour blindB. 50% colour blindC. all normalD. all colour blind

A normal woman, whose father was colour blind is married to a normal man. The sons would beA. `75%` colour blindB. `50%` colour blindC. All normalD. All colour blind

The polytene chromosomes were discovered for the first time inA. ChrinomusB. FruitflyC. DrosophilaD. House fly

Crossing overt takes palace at a stage betweenA. Letotone and dipoteneB. Pachytene and diploteneC. Zygotene and pachyteneD. Zygotene and diplotene

Genes which are cofined to differential region of the Y-chromosome only are called :A. MutantB. AutosomalC. HolndricD. Completely sex-linked

Genes located on differential region of Y-chromosome are calledA. XY linked genesB. Holandric genseC. Autosomal genesD. Mutant genes

The genes, which remains confined to differential region of Y-chromosome, areA. Autosomal genesB. Holandric genesC. Corpletely sex-linked genesD. Mutant genes

Mental retardation in man, associated with sex chromosomal abnormality is usually due toA. Reduction in X complementB. Increase in X complementC. Moderate increase in Y complementD. Large increase in Y complement

If recombination frequency between AB genes a `20%` and `BC` gene is `40%` and interference is `30%` in the case of double cross over than what will be coincidance under this condition ?A. 2.4B. 8C. 5.6D. 0.7

Two linked genes a nad b show 20% recombination the indivsuls of a hybrid cross between ++/++ X ab/ab shaoll show gemetes:A. `+ +80 :ab : 20`B. `+ +50 : ab : 50`C. `+ + 40 : ab 40 : + a 10 : + b : 10`D. `+ + 30 : ab 30 : + a 20 : + b : 20`

Chromosomes complement with 2n-1 is calle asA. MonosomyB. NullosomyC. TrisomyD. Tetrasomy

Match the following - (w.r.t. Pedigree analysis ) A. `a(iv), b(ii), c(ii), d(i)`B. `a(ii), b(iii), c(iv), d(i)`C. `a(iii), b(iv), c(ii), d(i)`D. `a(i), b(ii), c(iv), d(iii)`

Gane for colour blindness is located onA. Homologous part X- chroosomeB. Non - Homologous part of X- chromosomeC. Homologous part of Y -chromosomeD. Non -homologous part of Y-chromosome

Phenotypic ratio of dihybrid test cross is:A. `9:3:3:1`B. `15:1`C. `9:6:1`D. `1:2:1`

When two odd characters are present in a gane ,this is known asA. BigamousB. HeterozygousC. PlymorphiocD. Heteromorphic

A man a inherit his X chromosome fromA. His maternal grand mother or maternal grand fatherB. His fatherC. His maternal grand father onlyD. His paternal grand father

Percentage of recombination between A and B is 9% and C is 17%. B and C is 26%, then the arrangement of genes isA. A-B-CB. A-C-BC. B-C-AD. B-A-C

If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease isA. Autosomal recessiveB. Autosomal dominantC. Sex-linked recessiveD. Sex-linked dominant.

The terms cistron, recon and muton were proposed byA. W. IngramB. BastesonC. J. LederbergD. S. Benzer

A cross between pure tall Pea plant with green pods and dwarf Pea Plant with yellow pods will produce short `F_(2)` plant out of 16A. 9B. 3C. 4D. 1

During a mohohybrid cross involving a tall pea plant with a dwarf pea plant, the offspring populations were tall and dwarf in equal ratio. Work out a cross to show how it is possible.

Lathyrus odoratus is an example of which of the following genesA. Supplementry genesB. Complementry genesC. Lethel genesD. Condominant genes

A teachers wants his/her students to find the genotypes of pea plants bearing purple coloured flowers in their school garden. Name and explain the cross that will make it possible.

Which of the following genotypes of sweet pea plant is related with the production of purple coloured flowersA. CcPpB. `"CCpp"`C. `"ccPP"`D. `Ccpp`

Sex chromosomes of a female bird are represented byA. XOB. XXC. XYD. ZW

Genes present in the cytoplasm of eukaryotic cells, are found inA. Mitochondri and inherited viva egg cytoplasmB. Lysosomes and peroxisomesC. Golgi bodies and smooth endoplasmic reticulumD. Plasitds and inherited via male gamete

Chromosomes that determine male sex in Melandrium plant isA. Y chromosomeB. X chromosomeC. XX chromosomeD. None of these

In slpit genes, the coding sequences are calledA. Cistrons0B. OperonsC. ExonsD. Introns

The eukaryotic Chromosomes are made up ofA. DNAB. RNAC. DNA and proteinsD. DNA and lipids

The colour based contrasting traits in seven contrasting pairs, studied by Mendel in pea plant wereA. 1B. 2C. 3D. 4

On selfing a plant of `F_(1)`-generation with genotype "AABbCC", the genotypic ratio in `F_(2)` generation will beA. `1:2:1`B. `1:1`C. `9:3:3:1`D. `27:9:9:9:3:3:3:1`

A diplod organism is heteroxygous for 4 loci, how many typs of gametes can be produced ?

Briefly mention the contribution of T.H. Morgan in genetics.

A diploid organism is heterozygous for five loci and homozygous for 2 loci , how many types of gametes can be produced ?A. 128B. 32C. 4D. 14

How many types of gametes can be produced by a diploid organisms, if it is heterozygous for 3 loci?A. 6B. 4C. 8D. 3

The number of linkage group (s) present In Escherichia Coli is :A. 1B. 2C. 3D. 7

The segeration of paired herditary factors that Mendal postulated occures duringA. Anaphase of first meiotic divisionB. Metaphase of second meitoc divisionsC. During interphase between two meiotic divisonsD. Prophase of fistmeiotic division

Which of the following is incorrectly pairedA. Sry gene X chromosomeB. 2n-2-nullisomicC. Nucleiod prokaryoteD. Polytecnic

Mark the odd one (w.r.t dominant trait in garden pea)A. Yellow podB. Inflated podC. Axial flowerD. Yellow seed

In Pisum sativum there are 14 Chromosomes. How many paris with different chromosomal composition can be preparedA. 14B. 7C. `2^(14)`D. `2^(7)`