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

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

NTA AbhyasNTA Abhyas 2022

Solution:

Chance of getting $a=\frac{1}{2}$
Chance of getting $b=\frac{1}{2}$
Chance of getting $h=\frac{1}{2}$
Chance of getting sperms with
$ a b h=\frac{1}{2} \times \frac{1}{2} \times \frac{1}{2}=\frac{1}{8} $