Question

45. A human male is heterozygous for autosomal gene
A Band G. He is also haemizygous for hemophilic
gene h. What proportion of his sperm will be abgh?
(1)1/4
2)1/8
3)1/16
4)1/32​

Answer 1

Answer:

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

Answer 2

Answer:Heterozygous for A and B ;Hemizygous for h.

Explanation :

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'.

Hope u have Understood

thank u