Principles of Inheritance and Variation Question 58

58. 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?

[2004]

(a) $\frac{1}{8}$

(b) $\frac{1}{32}$

(c) $\frac{1}{16}$

(d) $\frac{1}{4}$

Show Answer

Answer : a

Hints & Solution

(a) 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 abh $=\frac{1}{2} \times \frac{1}{2} \times \frac{1}{2}=\frac{1}{8}$