Question

4/31
h= normal blood clotting
h=hemophilia
x^h x^h x x^h y
what is the probability that any of their offspring will have hemophilia?
4/4
3/4
1/4
2/4

Explanation:

Step1: Create Punnett Square

The mother's genotype is $X^H X^h$ and the father's is $X^H Y$. The possible gametes from the mother are $X^H$ and $X^h$, and from the father are $X^H$ and $Y$. The Punnett square is:

	$X^H$	$Y$
$X^h$	$X^H X^h$	$X^h Y$

Step2: Identify Hemophilic Genotypes

Hemophilia is $X^h Y$ (since males with $X^h$ and females need $X^h X^h$). From the square, only $X^h Y$ is hemophilic. There are 4 possible offspring, 1 with $X^h Y$.

Step3: Calculate Probability

Probability = $\frac{\text{Number of hemophilic offspring}}{\text{Total offspring}} = \frac{1}{4}$.

Answer:

1/4 (corresponding to the option with "1/4")