Question

A pure line of guinea pigs with genotype a/a; b/b is crossed to a pure line with genotype a/a; b/b. the f1 male and female guinea pigs are crossed to each other to generate the f2. what proportion of the f2 individuals are the result of a recombinant egg being fertilized by a recombinant sperm?

a. 1/16
b. 2/16
c. 4/16
d. 6/16
e. 10/16

Answer 1

The cross of pure line of guinea with AA/bb and aa/BB genotype using a punnet square result to a F1 generation of AaBb gene combination
TO get F2 generation a male of AaBb gene combination is crossed with a female of AaBb gene combination as in figure below.

The F2 individual that are result of recombination egg being fertilized by a recombinant sperm ( AaBb) are 4/16