Question

A male human is heterozygous for autosomal genes A and B. He is also hemizygous for haemophilic gene h. What proportion of sperms will carry abh.

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

Answer 1

Answer: (A)

$1/8$

Heterozygous for A and B ;Hemizygous for h.

Therefore the genotype would be:

AaBbXh Y

(hemizygous for h as in for human males can only fall on X)

(hemizygous for female would be Xh X)
All the kinds of gametes you can get with this,,,
abXh
ABXh
abY
AbY
aBX
aBY
ABY
AbXh
but they are asking for portion of abXh..

Therefore its 1/8

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