Mr. Steve W. genetics question Albinism is a recessive autosomal trait for skin pigmentation. Hemophilia is a sex-linked recessive disorder of the blood.   assign alleles to the traits                         A – normal skin pigmentation                  XH – normal blood                         a – albino                                                      Xh - hemophilia A double heterozygous woman marries a non-hemophilic man and is heterozygous for skin pigmentation. Double heterozygous means heterozygous for both traits. Aa for skin pigmentation and XHXh for blood traits. Therefore, the genotype of the woman is AaXHXh.      Non-hemophilic man is XHY and heterozygous for skin pigmentation is Aa. The genotype, therefore, of the man is AaXHY.     What is the probability that they will have:   a child with normal skin? _____________________   a child with normal blood? _____________________   an albino girl? _____________________   A hemophilic boy? _____________________

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