Mendelian and Post Mendelian Genetics Multiple Choice Questions with Answers | Mendelian and Post Mendelian Genetics Quiz

61 In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in F[ generation?

A 9 : 1

B 1 : 3

C 3 : 1

D 50 : 50

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Answer: 50 : 50

62 Inheritances of skin colour in humans is an example of

A point mutation

B polygenic inheritance

C codominance

D chromosomal aberration

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Answer: polygenic inheritance

63 In the hexaploid wheat, the haploid («) and basic (a–) numbers of chromosomes are

A n = 21 and r = 21

B rx = 21 and jc = 14

C n = 21 and = 7

D n = 7 and x = 2

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Answer: n = 21 and = 7

64 A common test to find the genotype of a hybrid is by

A crossing of one F2 progeny with female parent

B studying the sexual behaviour of F. progenies

C crossing of one F, progeny with male parent

D crossing of one F2 progeny with male parent

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Answer: crossing of one F, progeny with male parent

65 Test cross involves

A crossing between two genotypes with dominant trait

B crossing between two genotypes with recessive trait

C crossing between two F, hybrids

D crossing the F, hybrid with a double recessive genotype

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Answer: crossing the F, hybrid with a double recessive genotype

66 In Mendel’s experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY x rryy?

A round seeds with yellow cotyledons, and wrinkled seeds with yellow cotyledons

B only round seeds with green cotyledons

C only wrinkled seeds with yellow cotyledons

D only wrinkled seeds with green cotyledons

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