Question

A male human is heterozygous for autosomal genes A and B and is also hemizygous for hemophilic gene h. What proportion of his sperms will be abh?

• A. $1/8$
• B. $1/32$
• C. $1/16$
• D. $1/4$

Answer 1

The correct option is A $1/8$

The genotype of a human male in question must be Aa Bb X^hY.

Hence 2 x 2 x 2 = 8 types of gametes would be formed. AB X^h, ABY, aB X^h.

aBY, AbX^h, AbY, abX^h, abY.

Hence, 1/8 proportion of his sperms would be abh.

So, the correct answer is '1/8.'