Answer:
e. 25%
Explanation:
- Hemophilia is inherited in the X-linked recessive pattern. This means that two recessive alleles need to be present in an affected individual.
- Since the father is affected, his genotype is [tex]X^{h}[/tex]Y.
- The mother is heterozygous i.e. a carrier for the hemophilia allele with the genotype [tex]X^{H}[/tex][tex]X^{h}[/tex].
Punnet Square:
[tex]X^{H}[/tex] [tex]X^{h}[/tex]
[tex]X^{h}[/tex] [tex]X^{H}[/tex][tex]X^{h}[/tex] [tex]X^{h} X^{h}[/tex]
Y [tex]X^{H} Y[/tex] [tex]X^{h} Y[/tex]
- According to the Punnett square above, the probability of an affected daughter i.e. genotype [tex]X^{h} X^{h}[/tex] is 1/4 i.e. 25%.
