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1)Hemophilia (bleeding disorder) can be caused by a gene on the X chromosome

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1)Hemophilia (bleeding disorder) can be caused by a gene on the X chromosome. The normal allele is dominant to the recessive allele. A man with hemophilia marries a woman who is heterozygous for the hemophilia allele. What is the chance that they will have a girl with hemophilia?

2. Normal red-green color vision is coded for by a gene on the X chromosome. The normal allele is dominant and the abnormal one is recessive. A person must have at least one normal allele to have normal red-green color vision. A woman with normal color vision whose father has red-green color blindness marries a man who has normal color vision. What percent of their boy children would you expect to have normal color vision?

3. What is the chance that a woman who is homozygous recessive for hemophilia and a man with normal blood clotting will have a child with normal blood clotting?