InterviewSolution
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InterviewSolution
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.
| 1. |
ABO blood group is determined by three different alleles. How many genotypes and phenotypes are possible?A. `{:(,"Genotype",,"Phenotype"),((a),6,"",4):}`B. `{:(,"Genotype",,"Phenotype"),((b),3,"",1):}`C. `{:(,"Genotype",,"Phenotype"),((c),4,"",6):}`D. `{:(,"Genotype",,"Phenotype"),((d),9,"",7):}` |
| Answer» Correct Answer - A | |
| 2. |
In a back cross, a `F_(1)` hydrid is crossed with dominant parent , the offsprings :A. All will be tallB. 3 tall : 1 shortC. 1 tall : 1 shortD. 1 tall : 3 short |
| Answer» Correct Answer - A | |
| 3. |
The gene intraction when on egenes masks the effect or When a gene pair hides the effect of another, the phenomenon is calledA. epistatic factorB. duplicate factorC. complementary factorD. supplementary factor |
| Answer» Correct Answer - A | |
| 4. |
In a genetic cross having recessive epistasis, `"F"_(2)` phenotypic ratio would be:A. `12 : 3 : 1`B. `15 : 1`C. `9 : 6 : 1`D. `9 : 3 : 4` |
| Answer» Correct Answer - D | |
| 5. |
The gene which suppresses and masks the expression of other is:A. recessiveB. epistasisC. co-dominantD. complementary |
| Answer» Correct Answer - B | |
| 6. |
Recessive epistasis is defined as:A. a situation in which a gene pair in homozygous recessive condition masks the effect of one or both the member of another gene pairB. a situation in which the dominant allele of the first gene pair masks the effect of both the members of the second gene pair and the dominant allele of the second gene pair masks the effect of both the members of the first gene pairC. a situation in which one allele does not allow its alternative form to expressD. a situation in which the dominant allele of one gene pair masks the effect of both members of another gene pair |
| Answer» Correct Answer - A | |
| 7. |
In shortorn cattle genes for red `(r_(1))`and white `(r_(2))` coat colour occcur. Crosses between red `(r_(1)r_(2))` and white `(r_(2)r_(2))` produced `(r_(1)r_(2))` roan. This an example ofA. epistasisB. co-dominanceC. complementary genesD. incomplete dominance |
| Answer» Correct Answer - B | |
| 8. |
Sometimes a gene masks the expression of another, gene at a different locus. This phenomenon is known as:A. epistasisB. co-dominanceC. incomplete dominanceD. none of these |
| Answer» Correct Answer - A | |
| 9. |
A gene whose phenotypic effect kills the bearer is called:A. lethalB. pleiotropicC. supplementaryD. complementary |
| Answer» Correct Answer - A | |
| 10. |
Which of the following crosses and resultant phenotypic ratios are mismatched?A. `{:(,"Cross",,"Phenotypic ratio"),((a),"Tt"xx"Tt",-,3:1):}`B. `{:(,"Cross",,"Phenotypic ratio"),((b),"tt"xx"Tt",-,2:1):}`C. `{:(,"Cross",,"Phenotypic ratio"),((c),"TtYy"xx"ttyy",-,1:1:1:1):}`D. `{:(,"Cross",,"Phenotypic ratio"),((d),"TtYy"xx"TtYy",-,9:3:3:1):}` |
| Answer» Correct Answer - B | |
| 11. |
A cross between plants having RRYY and rryy compasition will yield plants with:A. round and yellow seedsB. round and green seedsC. wrinkled and green seedsD. wrinkled and yellow seeds |
| Answer» Correct Answer - A | |
| 12. |
Who has discovered the lethal gene of yellow coat in mice?A. MullerB. CuenotC. MorganD. Correns |
| Answer» Correct Answer - B | |
| 13. |
Match the genetic phenomena with their respective ratios. `{:(,"Column I",,"Column II"),("A","Inhibitory gene ratio",1,"9 : 3 : 4"),("B","Complementary gene ratio",2,"1 : 1 : 1 : 1"),("C","Recessive epistasis ratio",3,"12 : 3 : 1"),("D","Dihybrid epistasis ratio",4,"13 : 3"),("E","Dominant epistasis ratio",5,"9 : 7"):}`A. A=5, B=4, C=3, D=2, E=1B. A=1, B=2, C=4, D=3, E=5C. A=4, B=5, C=1, D=2, E=3D. A=5, B=4, C=1, D=2, E=3 |
| Answer» Correct Answer - C | |
| 14. |
Organism heterozygous for two genes shall be:A. RRYYB. RrYYC. RRYyD. RrYy |
| Answer» Correct Answer - D | |
| 15. |
`"F"_(2)` dihybrid ratio 12 : 3 : 1 is explained on the basis of:A. epistatic interactionB. complementary gene actionC. interaction between two allelesD. both (a) and (b) |
| Answer» Correct Answer - A | |
| 16. |
The gene for right handedness is dominant over the gene for left handedness. Most probable gene types of two right handed parents with left handed child isA. RR `xx` rrB. RR `xx` RrC. Rr `xx` RrD. Rr `xx` RR |
| Answer» Correct Answer - C | |
| 17. |
A dominant lethal gene:A. determine the sex of the organismB. kills the organism in which it is presentC. allows the organism to survive and to reproduceD. allows the organism to survive but not to reproduce |
| Answer» Correct Answer - B | |
| 18. |
Pure tall plant is crossed to dwarf plant. `F_(1)` generation consists of only tall plants while `F_(2)` generation has both tall and dwarf in ratio of 3:1. The phenomenon is due toA. heredityB. dominanceC. inheritanceD. co-dominance |
| Answer» Correct Answer - B | |
| 19. |
Ratio `9 : 3 : 3 : 1` is due to:A. lethal genesB. dihybrid crossC. duplicate genesD. monohybrid cross |
| Answer» Correct Answer - B | |
| 20. |
A gene is said to dominant if:A. it never expresses in any conditionB. it expresses only in heterozygous conditionC. it express its effect only in homozygous conditionD. it expresses both in heterozygous and homozygous condition |
| Answer» Correct Answer - D | |
| 21. |
A blue Andalusian fowl is the product of mating black fowl with white fowl. A cross of blue fowl with another blue fowl results in:A. 1 black : 2 white : 1 blueB. 1 black : 2 blue : 1 whiteC. 2 black : 1 white : 1 blueD. none of the above |
| Answer» Correct Answer - B | |
| 22. |
Dihybrid test cross ratio isA. `1 : 2 : 1`B. `1 : 1`C. `9 : 3 : 4`D. `9 : 3 : 3 : 1` |
| Answer» Correct Answer - D | |
| 23. |
A plant having 24 cm long internodes is crossed with a plant having 12 cm long internodes. The hybrids have 18 cm long internodes due toA. multiple allelismB. complete dominanceC. recessive dominanceD. incomplete dominance |
| Answer» Correct Answer - D | |
| 24. |
The character which appears at `"F"_(1)` generation is:A. recessiveB. dominantC. incomplete recessiveD. incomplete dominant |
| Answer» Correct Answer - B | |
| 25. |
In Andalusian fowls, if a cross is made beween black fowl and splashed white, what will be the phenotypic ratio in `"F"_(2)`?A. `1 : 1`B. `3 : 1`C. `9 : 3 : 1`D. `1 : 2 : 1` |
| Answer» Correct Answer - B | |
| 26. |
Phenotypic ratio of monohybrid test cross is:A. `1 : 1`B. `3 : 1`C. `1 : 2 : 1`D. None of these |
| Answer» Correct Answer - A | |
| 27. |
In `"F"_(2)` the phenotypic ratio of dihybrid cross is:A. `1 : 1 : 1 : 1`B. `3 : 1`C. `9 : 3 : 3 : 1`D. `9 : 3 : 4` |
| Answer» Correct Answer - C | |
| 28. |
Phenotypic dihybrid ratio in `"F"_(2)` generation is:A. `1 : 3`B. `9 : 3 : 3 : 1`C. `1 : 2 : 1`D. `1 : 1 : 1 : 1` |
| Answer» Correct Answer - B | |
| 29. |
If an organism is crossed with homozygous recessive recesive individual, it is called :A. back crossB. test crossC. simple crossD. monohybrid cross |
| Answer» Correct Answer - B | |
| 30. |
When two hybrids of rrTt and Rrtt are crossed, the phenotypic ratio of offspring shall be:A. `1 : 1`B. `1 : 1 : 1 : 1`C. `3 : 1`D. `9 : 3 : 3 : 1` |
| Answer» Correct Answer - B | |
| 31. |
The phenotypic ratio obtained in quantitive inheritance of a dihybrid cross is or In a cross between red kernelled and white kernelled varities of wheat showingf polygenic inheritence the phenotypic inheritence the phenotypic ratio in `F_(2)` generation will beA. `1 : 2 : 1`B. ` 9 : 3 : 3 : 1`C. `1 : 4 : 6 : 4 : 1`D. `1 : 6 : 15 : 20 : 15 : 6 : 1` |
| Answer» Correct Answer - C | |
| 32. |
If two alleles come together, only one is able to express it self. This is called:A. Law of dominanceB. Law of segregationC. Law of incomplete dominanceD. law of independent assortment |
| Answer» Correct Answer - A | |
| 33. |
In a cross 45 tall and 14 dwarf plants were obtained. Genotypes of parents are:A. `"Tt"xx"tT"`B. `"TT"xx"tt"`C. `"TT"xx"Tt"`D. `"TT"xx"TT"` |
| Answer» Correct Answer - A | |
| 34. |
In monohybrid cross, when both alleles express equally well, the `"F"_(2)` phenotypic ratio becomes:A. `1 : 1`B. `3 : 1`C. `9 : 3 : 1`D. `1 : 2 : 1` |
| Answer» Correct Answer - D | |
| 35. |
Cross between homozygous black rough (BBRR) guinea pig and homozygous white smooth guinea pig (bbrr) produced black and rough animals in `F_(1)` generation. Presuming the genes to be present on different chromosomes, the percentage of `F_(2)` individuals which are heterozygous for both the gene pairs would beA. 0.25B. 0.5C. 0.75D. 0.35 |
| Answer» Correct Answer - A | |
| 36. |
A dihybrid for qualitative trait is crossed with homozygous recessive individual of its type, the phenotypic ratio is:A. `1 : 2 : 1`B. `3 : 1`C. `1 : 1 : 1 : 1`D. `9 : 3 : 3 : 1` |
| Answer» Correct Answer - C | |
| 37. |
Phenotypic ratio of dihybrid test cross is:A. `15 : 1`B. `3 : 1`C. `9 : 3 : 3 : 1`D. `1 : 1 : 1 : 1` |
| Answer» Correct Answer - D | |
| 38. |
In a monohybrid cross, the genotypic ratio of `"F"_(2)` is:A. `"3 ":" 1"`B. `"1 ":" 2 ":" 1"`C. `"4 ":" 0"`D. `"1 ":" 1 ":" 1 ":" 1"` |
| Answer» Correct Answer - B | |
| 39. |
`1 : 2 : 1` phenotypic and genotypic ratio is found in:A. pseudoallelesB. multiple allelesC. blending inheritanceD. complementary genes |
| Answer» Correct Answer - C | |
| 40. |
In a dihybrid cross, pure homozygous plants will be:A. 2B. 1C. 3D. 9 |
| Answer» Correct Answer - A | |
| 41. |
Genotypic ratio of dihybrid cross is:A. `1 : 2 : 2 : 4 : 3 : 1 : 2 :1`B. `1 : 3 : 2 : 4 : 2 : 1 : 2 : 1 : 2`C. `1 : 2 : 2 : 4 : 2 : 1 : 2 : 1 : 1`D. `1 : 2 : 2 : 4 : 2 : 2 : 2 : 1` |
| Answer» Correct Answer - C | |
| 42. |
In pumpkins, yellow (Y) is dominant over white, big (B) is dominant over small (b). What is the expected phenotypic ratio of the offsprings when pumpkins, heterozygous for both traits are crosses?A. `9 : 7`B. `1 : 1 : 1 : 1`C. `9 : 3 : 4`D. `9 : 3 : 3 : 1` |
| Answer» Correct Answer - D | |
| 43. |
In a cross between AABB `xx`aabb, the ratio of `F_(2)` genotype between AABB, AaBB,Aabb and aabb would beA. `1 : 1 : 1 : 1`B. `9 : 3 : 3 : 1`C. `1 : 2 : 2 : 4`D. `1 : 2 : 2 : 1` |
| Answer» Correct Answer - C | |
| 44. |
From a cross AABb `xx` aaBb, the genotypes AaBB, AaBb, Aabb, aabb will be obtained in the following ratio:A. `1 : 2 : 1 : 0`B. `1 : 1 : 1 : 1`C. `0 : 3 : 1 : 0`D. `1 : 1 : 1 : 0` |
| Answer» Correct Answer - A | |
| 45. |
A child with blood group genotype `"I"_("A")"I"_("B")` is born of a woman with genotype `"I"_("B")"I"_("B")`. The father could not be a man of genotype:A. `"I"^("A")"I"^("A")`B. `"I"^("A")"I"^("B")`C. `"I"^(" B")"I"^("B")`D. `"I"^("A")`i |
| Answer» Correct Answer - C | |
| 46. |
Gametes of AaBb individuals can be:A. Aa, BbB. AB, aB, abC. AB, abD. AB, Ab, aB, ab |
| Answer» Correct Answer - D | |
| 47. |
Which of these could be a normal gamete?A. RyB. RyyC. RrYD. RrYy |
| Answer» Correct Answer - A | |
| 48. |
A trihybrid cross is made between two yeasts, both with genotypes AsBbCc. What proportion of the offspring will be of the genotypes aabbcc? |
| Answer» Correct Answer - D | |
| 49. |
The organism chosen by Mendel to explain the laws of inheritance was:A. Homo sapiensB. Pisum sativumC. Antirrhinum majusD. Drosophia melanogaster |
| Answer» Correct Answer - B | |
| 50. |
In guinea pigs, black short hair (BBSS) is dominant over white long hair (bbss). During a dihybrid cross, the `"F"_(2)` generation individuals with genotypes, BBSS, BbSS, BBSs and BbSs are in the ratio of:A. `9 : 3 : 3 : 1`B. `4 : 2 : 1 : 2`C. `1 : 2 : 2 : 4`D. `1 : 2 : 1 : 2` |
| Answer» Correct Answer - C | |