Principles of Genetics and Breeding

Answers

1. Ans. Of the 9100 Non-Blue coloured carps, we can expect approximately 4200 to be heterozygotes and 4900 homozygotes.

2. a)Gene frequency of D=0.55,

gene frequency of d=0.45

b) In F₂ offspring P=0.3025

H=0.495

Q=0.2025

c) In F₂ generation, the population is in Hardy-Weinberg equilibrium. Gene and genotypic frequencies in the F₃ and later generations should therefore be the same as in the F₂s.

3. Frequency of G allele = 0.6,

Frequency of G¹ allele = 0.4

Genotypic frequency GG=0.36, G G¹=0.48, G¹ G¹=0.16

4. f (Y-linked allele= No. of ♂ with Y-linked Phenotype/Total no. of males)

The frequency of the Yma gene in this population is 0.4.