question_answer

A and B genes are linked. What should be the genotype of progeny in a cross between AB/ab and ab/ab ?

A)  AA bb and aa bb             

B)  Aa Bb and aa bb

C)  AA BB and aa bb             

D)  None of these

Correct Answer: D

Solution :

                 The \[{{F}_{1}}\] dihybird (AB/ab) is obtained after making a cross between AB/Ab x ab/ab and then they are used to get the test cross progeny. The formation of gametes from dihybrid (AB/ab) in presence and absence of crossing over.