In a cross between AABB x aabb, the ratio of F2 genotypes between AABB, AaBB, Aabb and aabb would be
(a) 9 : 3 : 3 : 1
(b) 2 : 1 : 1 : 2
(c) 1 : 2 : 2 : 1
(d) 7 : 5 : 3 : 1.
Answer.
c. 1 : 2 : 2 : 1
Explanation.
AABB x aabb-----parents.
AaBb-----------F1 hybrid.
AaBb x AaBb
AB | Ab | aB | ab | |
AB | AABB | AABb | AaBb | AaBb |
Ab | AABb | AAbb | AaBb | Aabb |
aB | AaBB | AaBb | aaBB | aaBb |
ab | AaBb | Aabb | aaBb | aabb |
In a cross between AABB x aabb, the ratio of F2 genotypes between AABB, AaBB, Aabb...
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