Q. A and B genes are linked. What shall be genotype of progeny in a cross between AB/ab and ab/ab :

Q. A and B genes are linked. What shall be genotype of progeny in a cross between AB/ab and ab/ab :

(a) AAbb and aabb

(b) AaBb and aabb

(c) AABB and aabb

(d) None of these

Solution :

Correct option : B Two genes are said to be under linkage or linked when they are located on the same chromosome and have the tendency to be inherited together.
If A and B are linked, then a cross between AB/ab and ab/ab,
ab
AB AaBb
ab aabb
Therefore the progeny in a cross between AB/ab and ab/ab will have the genotype AaBb and aabb.