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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
601. |
Test cross is used to checkA. Check herterzygosity in`F_(1)` generationB. Check heterzygous in `F_(2)` generationC. Check independent assormentD. Check segration |
Answer» Correct Answer - A | |
602. |
Mendel found that reciprocal crosses yielded indentical results. From that he concludedA. There is independent assortment of traitB. Sex plays a role In deciding the domince of traitC. There is no dominace of any traitD. Sex has no infiuence on the dominnce of traits |
Answer» Correct Answer - D | |
603. |
Which one is the incorrect statement with regards to the importance of pesigree analysisA. It confirms that DNA is the carrier of genstic informationB. It help ti understant whether the triat in question is domonat or recesiveC. It Confiorms thaat the traits is linked to one of the autosomeD. It helpto the inertance of a spific trait |
Answer» Correct Answer - A (a) In the pedigree analysis the inheritance of a particular trit is represented in the family treee over genertion . |
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604. |
Character choosen by Mendel are locted on how many chromosomeA. 4B. 14C. 7D. 49 |
Answer» Correct Answer - A (a) Genes controlling seven traits in pea studied by mendel are located on 4 chromosome cotyledon and seed coat colour on chromosome-1, of pod form, flower position and stem length on chromosome 4, of pod colour on chromosome 5 and of seed form on chromosome 7. |
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605. |
When yellow round heterozygous Pea Plants are self fertilized, the frequency of occurrence of RrYY genotype among the offspring isA. `(9//16)`B. `(3//16)`C. `(2//16)`D. `(1//16)` |
Answer» Correct Answer - C | |
606. |
In the XX-XO type of sex chromosomes inA. Females produce only one type of eggsB. Females have only one X-chromosomesC. Males have two X- chromosomesD. Males are homogametic |
Answer» Correct Answer - A | |
607. |
In XO type of sex determinationA. Females produce two types of gametesB. Males produce two types of gametesC. Females produce gametes with Y-chromosomeD. Males produce gametes with Y-chromosome |
Answer» Correct Answer - B It was also observed that in a large number of insects the mechanism of sex determination is of the XO type, i.e. all eggs bear an additional X-choromosome besides the other chromosomes (autosomes). On the other hand some of the sperms bear the X-chromosome whereas some do not. Eggs fertilised by sperm having an X-chromosome become females and, those fertilised by sperms that do not have an X-chromosome become males. The number of chromosomes in the male and female are not equal. Due to the involvement of the X-chromosomes in the determination of sex, it was designated to be the sex chromosome, and the rest of the chromosome were named as autosomes. Grasshopper and cockroach is an example of XO type of sex determination in which the males have only one chromosome besides the autosomes, whereas females have a pair of X-chromosomes. |
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608. |
In XO type of sex determinationA. Females produce two different type of gametesB. Males produce two different types of gametesC. Females produce two different with Y chromosomesD. Male produce single type of gametes |
Answer» Correct Answer - B | |
609. |
Choose the wrong statement.A. In grasshopper, besides autosomes, males have only one -X-chromosome whereas females have a pair of X-chromosomes.B. In Drosophila, males have one X-and one Y-chromosome whereas females have a pair of X-chromosomes besides autosomes.C. In birds, females have one Z-and one W-chromosome, whereas males have a pair of Z- chromosome besides autosomes.D. In insects with XO type of sex determination, all sperms have X-chromosomes besides autosomes. |
Answer» Correct Answer - D Grasshopper and cockroach is an example of XO type of sex determination in which the males have only one chromosome besides the autosomes, whereas females have a pair of X-chromosomes. Among the male Drosophila an X-chromosome is present but its counterpart is distinctly smaller and called the Y-chromosome. Females, however, have a pair of X-chromosomes. Both males and females bear same number of autosomes. In birds, females have one Z and one W chromosome, whereas male have a pair of Z-chromosomes besides the autosomes. It was also observed that in a large number of insects the mechanism of sex determination is of the XO type, i.e. all eggs bear an additional X-chromosome besides the other chromosomes (autosomes). On the other hand, some of the sperms bear the X-chromosomes some whereas some do not. |
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610. |
ZW, XO, XY and haplo-diploid type of sex determination is seen in respectivelyA. Parrot, cockroach, Melandrium and honey beeB. Aptenodytes, grasshopper, Drosophila and ApisC. Pavo, grasshopper, man and honey beeD. All of the above |
Answer» Correct Answer - D ZW, XO, XY and haplo-diploid type of sex determination is seen in birds (Pavo, parrot, Aptenodytes), insects (cockroach, grasshoper), man Drosophila, Melandrium, and Apis (honey bee) respectively. |
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611. |
Which of the following genotype represents heterozygous condition ?A. `"TT"`B. `"tt"`C. `Tt`D. `"RR"` |
Answer» Correct Answer - C | |
612. |
Sahiwal cows of punjab are developed byA. Artificial selectionB. DomesticationC. Both (1) & (2)D. Mutation |
Answer» Correct Answer - C | |
613. |
What is the example of inheritance pattern shown? A. PhenyketonuriaB. Sickle cell anaemiaC. HaemophiliaD. Thalassemia |
Answer» Correct Answer - C | |
614. |
In which mode of inheritance do you except more maternal influence among the offspringA. Y-LinkedB. X-linkedC. AutosomalD. Cytoplasmic |
Answer» Correct Answer - D | |
615. |
Mother homozygous B, and father is A. what will be the possible blood group in their progenyA. AB & B possibleB. AB & A possibleC. A and B possibleD. O possible |
Answer» Correct Answer - A | |
616. |
The main aim of the human genome project is..........A. is develop better technique for comparing two different human DNA sampelsB. to remove disease causing genes from human DNAC. to introduce new gene into humansD. to identify the sequence of all the genes presnet in human DNA |
Answer» Correct Answer - D | |
617. |
In recent years,DNA sequences (nucleotide sequence) of maternal DNA and Y-chromosome were considered for the study of human evolution ,because :A. their structure is known in greater detailB. they can be studied from the samples of fossil remainsC. they are small and therefore, easy to studyD. they are uniparental in origin and do not take part in recombination |
Answer» Correct Answer - D Wilson nad Sarich choose mitochondrial DNA (mtDNA) for the study of maternal line inheritance. While Y-chromosomes were considered for the study of human evolution particularly male domain. It is possible because they are uniparental in origin and do not take part in recombination. |
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618. |
Generation of non-parental gene combination is termed asA. LinkageB. PolyploidyC. RecombinationD. Aneuploidy |
Answer» Correct Answer - C | |
619. |
which of the following statements is not true of two genes that show 50 % recombination frequency ?A. The genes are tightly kinked.B. The genes show independent assortment.C. If the genes are present on the saame crossovers some, they undergo more than one crossovers in every meiosis.D. The genes may be on different chromosomes |
Answer» Correct Answer - A | |
620. |
In a population of 1000 individuals 360 belong to genotype AA, 480 to Aa and the remaining 160 to aa. Based on this data, the frequency of allele A in the population isA. `0.4`B. `0.5`C. `0.6`D. `0.7` |
Answer» Correct Answer - C | |
621. |
The incorrect statement with regard to Haemophilia isA. It is recessive diseaseB. It is a dominant diseaseC. A single protein involved in the clotting in blood is affectedD. It is sex-linked disease |
Answer» Correct Answer - B | |
622. |
Which Mendelian idea is depricted by a cross in which the `"F"_(1)` generations resembles both the parents?A. Law of dominanceB. Inheritance of one geneC. Co-dominantD. Incomplete dominance |
Answer» Correct Answer - C | |
623. |
The incorrect statement with regard to haemophilia isA. it is a sex-linked diseaseB. it is a recessive diseaseC. it is a dominant diseaseD. a single protein involved in the clotting of blood is affected |
Answer» Correct Answer - C Out of the following statement (c ) is incorrect because haemophilia is a sex linked recessive disease. In this disease, a single protein that is a part of the cascade of protein involved in the clotting of blood is affected. The heterozygous female for haemophilia may transmit the disease to sons. |
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624. |
Which Mendelian idea is depicted by a cross in which the `F_(1)`-generation resembles both the parents?A. Incomplete dominanceB. Law of dominanceC. Inheritance of one geneD. Codominance |
Answer» Correct Answer - D In codominanc, both alleles of a pair express themselves fully in `F_(1)` hybrid so, it resembles both the parents. In incomplete dominance, the two genes of allelogmorphic pair are not related as dominant or recessive, but each of them express itself partially. Law of dominance states that when a cross is made between two homozyous individuals considering contrasting trait of simple character then the trait that appear in `F_(1)` hybrids is called dominant. Inheritance of one gene is based on crossing between single tratits. |
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625. |
If both the parents are carriers for thalassemia which is an autosomal recessive disorder what are fthe chances of pregnancy resulting in an affected childA. `50%`B. `25%`C. `100%`D. No chance |
Answer» Correct Answer - B | |
626. |
If both the parents are carriers for thalassemia which is an autosomal recessive disorder what are fthe chances of pregnancy resulting in an affected childA. 0.5B. 0.25C. 1D. non chance |
Answer» Correct Answer - B | |
627. |
Mendel proposed law of domiance and low of segregation based on his observations onA. Menohybrid crossesB. Dihybrid crossesC. Test crossesD. Out crosses |
Answer» Correct Answer - A | |
628. |
A cross between `F_(1)` hybrid and its homozygous recessive parent is calledA. Out crossB. Test crossC. Monohybrid crossD. Dihybrid cross |
Answer» Correct Answer - B | |
629. |
When dominant and recessive alleles express themselves together, it is calledA. DominanceB. Co-dominanceC. AmphidominanceD. Pseudodominance |
Answer» Correct Answer - B Codominace is a condition in which heterozygote where both membres of an allelic pair conditbute to phenotype, which is then a mixture of the phenotypic traits produced in either homozygous roan offspring whose coat consist of both red and white hair. |
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630. |
Mutations can be induced withA. infra red ratiationsB. IAAC. ethyleneD. gamma radiations |
Answer» Correct Answer - D | |
631. |
Which one of the following conditions correctly describes the manner of determining the sex in the given exampleA. Homozygous sex chromosomes (XX) produce male in Drosophila.B. Homozygous sex chromosomes (ZZ) determine female sex in Birds.C. XO type of sex chromosome determine male sex in grasshopperD. XO condition in human as found in turner Syndrome, determine female sex. |
Answer» Correct Answer - C | |
632. |
Test cross in plants or in Drosophila involves crossing:A. The `F_(1)` hybrid with a double recessive genotupeB. Between two genotypes with dominant traitC. Between the genotype with recessive traitD. Between two `F_(1)` hybrid |
Answer» Correct Answer - A | |
633. |
When two unrelated individuals or lines are crossed, the performance of `F_(1)` hybrids is often superior to both its parents. The phenomenon is calledA. MetamorphosisB. HeterosisC. TransformationD. Splicing |
Answer» Correct Answer - B | |
634. |
When two unrelated individuals or lines are crossed, the performance of `F_(1)` hybrids is often superior to both its parents. The phenomenon is calledA. heterosisB. transformationC. splicingD. metamorphosis |
Answer» Correct Answer - A | |
635. |
In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree. A. Autosomal dominantB. X-linked recessiveC. Autosomal recessiveD. X-linked dominant |
Answer» Correct Answer - C The given pedigree shows the autosomal recessive disorder. In this disorder, the individual inherit two mutated genes, one from each parent. This disorder is usually passed on by two carries. Health is rarely affected, but individual have one mutated gene (recessive gene) and one normal gene (dominant gene) for the condition. The carries have a 25% chance of having an unaffected child with normal genes, 50% chance of having an unaffected child who also is a carrier and a 25% chance of having an affected child with recessive genes. |
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636. |
Colour blindness is caused by a singleA. Dominant gene in womanB. Dominant gene in manC. Recessive gene in manD. Recessive gene in woman |
Answer» Correct Answer - C | |
637. |
In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree A. X- linked recessiveB. Autosomal recessiveC. X-linked dominantD. Autosomal dominant |
Answer» Correct Answer - B | |
638. |
Which of the following statement about colour blindness is correctA. `2%` men are red colour blind, `6%` are green colour blindB. `6%` men are red colour blind, `2%` are green colour blindC. `10%` men are red colour blind, `5%`are green colour blindD. `5%` men are red colour blind, `10%` are green colour blind |
Answer» Correct Answer - A | |
639. |
Given below is a pedigree chart showing the inheritance of a certain sex-linked trait in humans Key: The trait traced in the above pedigree chart isA. Dominant X-linkedB. Recessive X-linkedC. Dominant Y-linkedD. Recessive Y-linked |
Answer» Correct Answer - A | |
640. |
Sickle-cell anaemia is :A. Characterised by elongated sickle-like RBCs with with a nucleusB. Caused by substitution of valine by glutamic acid in beta globin chain of haemoglobinC. Caused by a change in a single base pair of DNAD. An autosomal linked dominant trait. |
Answer» Correct Answer - C Sickle cell anaemia is caused by a change in a single base pair of DNA |
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641. |
Human blood grouping is ABO instead of ABC because O in it refers toA. No antigen A or B on RBCsB. Other antigens besides A and BC. Over dominance of its gene over A and B.D. One antibody only either anti-A or anit-B |
Answer» Correct Answer - A Human blood grouping is ABO instead of ABC because O in it refers to no antigen A or B or RBCs. |
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642. |
Sickle cell aneemia is most resistant to which diseaseA. MalariaB. FilariaC. DengueD. Chicken pox |
Answer» Correct Answer - A | |
643. |
Select the incorrect statement from the following :A. Baldness is a sex-limited traitB. Linkage is an exception to the principle of independent assortmentC. Galactosemia is an inborn error of metabolismD. Small population size results in random genetic drift in a population. |
Answer» Correct Answer - A Sex influenced (controlled) characters: The characters in which genes present on autosome but character is expressed (influenced) by sex of an individual. E.g: Baldness (dominant in male while recessive in female.) |
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644. |
Point mutation isA. Loss of geneB. Change in a base of geneC. Addition of a geneD. Deletion of a segment of gene |
Answer» Correct Answer - B Point mutation is change in a base of gene. |
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645. |
Sickle cell aneemia isA. An autosomal linked dominant traitB. Casued by susbtitution o fvaline by glutamic acid in the beta globin chain of haemoglobinC. Caused by a change in a single base pair of DNAD. Characterized by enlongated sickle like RBCs with a nucleus |
Answer» Correct Answer - C | |
646. |
Industrial melanism as observed in prepared moth proves thatA. The true black melanic forms arise by a recurring random mutationB. The melenic form o fthe moth has no selective advantage over higher form in industial areC. The lighter form moth has o slective advantage either in pollution-generated featureD. Melanism is a pollution generated feature |
Answer» Correct Answer - A | |
647. |
Alzhimer disease in humans is associated with the deficiency ofA. DopamineB. Glutamic acidC. AcetylcholineD. Gamma aminobutyric acid (GABA) |
Answer» Correct Answer - D | |
648. |
Alzhimer disease in humans is associated with the deficiency ofA. Gluetamic acidB. DopamineC. Gamma amino butyric acidD. Acetylcholine |
Answer» Correct Answer - D Alzheimer disease in humans is associated with the dificiency of acetylcholine. |
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649. |
When released from ovary human egg containA. One Y chromosomeB. Two X chromosomeC. One X chromosomeD. XY chromosome |
Answer» Correct Answer - C The female contains two X chromosomes. The eggs are produed by the meiososis .i.e., reducition division . So the egg contains are one X chormosome when relased from ovary . After fretilization the diplod phaese is restored. |
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650. |
Assertion : Addition or deletion of a base from a gene produce entirely a new polypeptide. Reason : Substitution mutation replaace a single amino acid in a polypeptid.A. If both A and R are true and R is the correct explanation of A.B. If both A and R are true and R is not the correct explanation of A.C. If A is true but R is falseD. If both A and R are false |
Answer» Correct Answer - B | |