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