3) In humans, hemophilia (a disease that affects the blood clotting process) is x-linked. A young...

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Biology

3) In humans, hemophilia (a disease that affects the bloodclotting process) is x-linked. A young man, John,
has hemophilia but his parents do not.
a) What are the genotypes of John and his parents?
b) If Johnâ€™s parents have additional children, what are theprobabilities that Johnâ€™s future sisters and
brothers will not have hemophilia?
c) Of Johnâ€™s 4 grandparents, only his fatherâ€™s father hashemophilia. What are the possible genotypes
of the 4 grandparents? From which of the grandparents could Johnhave inherited hemophilia?

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4.2 Ratings (706 Votes)

a let us assume normal allele is X and hemophilia allele isxJohns parents are not affected and john is affected So one ofthe parent is carrier Since it is x linked recessive trait thenmom should be a carrier Then their genotypes See Answer

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