Questions
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?
Answer: 50 : 50
62
Inheritances of skin colour in humans is an example of
Answer: polygenic inheritance
63
In the hexaploid wheat, the haploid («) and basic (a–) numbers of chromosomes are
Answer: n = 21 and = 7
64
A common test to find the genotype of a hybrid is by
Answer: crossing of one F, progeny with male parent
65
Test cross involves
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?
Answer: round seeds with yellow cotyledons, and wrinkled seeds with yellow cotyledons
67
How many different kinds of gametes will be produced by a plant having the genotype AABbCC?
Answer: two
68
Phenotype of an organism is the result of
Answer: genotype and environment interactions
