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Brut [27]
3 years ago
13

Please help me with this!!!

Biology
1 answer:
lesya692 [45]3 years ago
8 0

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 X^{h}Y.
  • The mother is heterozygous i.e. a carrier for the hemophilia allele with the genotype X^{H}X^{h}.

Punnet Square:        

             X^{H}        X^{h}

X^{h}       X^{H}X^{h}     X^{h} X^{h}

Y          X^{H} Y       X^{h} Y

  • According to the Punnett square above, the probability of an affected daughter i.e. genotype X^{h} X^{h} is 1/4 i.e. 25%.
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