Question

what is the probability of the offspring having hemophilia for the cross that is shown in the punnett square?
0 percent
25 percent
50 percent
75 percent

Explanation:

Step1: Analyze Punnett Square

The Punnett square has 4 possible offspring genotypes: \(X^H X^h\), \(X^H Y\), \(X^h X^h\), \(X^h Y\).

Step2: Identify Hemophilia Genotypes

Hemophilia (an X - linked recessive disorder) is expressed in \(X^h X^h\) (female) and \(X^h Y\) (male). From the square, \(X^h X^h\) and \(X^h Y\) are 2 out of 4 genotypes.

Step3: Calculate Probability

Probability = \(\frac{\text{Number of hemophilic genotypes}}{\text{Total number of genotypes}}\) = \(\frac{2}{4}\) = 50%.

Answer:

50 percent