Answer Happy

Color-blindness is due to an X-linked recessive allele (XN is normal vision and X" is color blind). ABO blood type is determined by an autosomal gene with codominant A (IA) and B (IB) alleles and a recessive O allele (i). A woman with normal color vision and blood type A gives birth to a girl who is color-blind and blood type O. Her husband has normal color vision and is blood type B. The woman's father has normal color vision and is blood type A, and her mother is blood type O with normal color vision. The husband's parents both have normal color vision; his father has blood type B and his mother has blood type O. The husband's sister has normal vision and type O blood. Based on the blood type of the baby girl, the husband believes he is not the father. You will need to draw a pedigree to answer this question, but you do not need to submit the pedigree for credit. In order to properly answer the question you need to assign the correct genotype to each family member in the pedigree. Based on your pedigree do you believe that the husband is the father of the child?