Question

In the above cross, what is the allelic composition of the female gamete?

• A. (ab)
• B. (aB)
• C. (Ab)
• D. (AB)

Answer 1

The correct option is B

(aB)

Since the gametes produced by the male parent are (AB), (Ab), (aB) and (ab), the male parent here is double heterozygous with the genotype (AaBb). And the female parent has produced only a single gamete, therefore it is double homozygous. Since the progenies all seem to be a combination of the male gametes and a gamete with allelic composition (aB), the female gamete seems to be (aB).