Question

Genes ‘‘a’’ and ‘’b’’ are linked with a recombination frequency of 10%. “A” is completely dominant over ‘’a’’ and ‘’B’’ is completely dominant of ‘’b’’. Assuming you start with the following parental genotypes AAbb and aaBB in a dihybrid cross

Indicate the percentage of F2 progeny following an F1 self-cross that have: only parental types, both parental and recombinant types and only recombinant types.

a. 90%, 10% 0%

b. 45%, 45%, 10%

c. 85%, 10%, 5%

d. 81%, 18%, 1%

e. 89%, 10%, 1%

The correct answer is D but im confused about why this is/ want the problem solved step by step

Answer 1

As per the dihybrid cross is concerned, the phenotypic ratio was considered to be 9:3:3:1 and the genotypic ratio was 1:2:2:4:1:2:1:2:1

Domina+ Recessive 8 Recensive Dominan Álleles A b Evo s s Pollina ion awele Aa B b a B aabb h Pareu tal pes Doly Pavental type - AAkb 2 othex Revomlbinaut type