B
babygirl52191
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Hemophilia results from the expression of a six0linked recessive gene h. Women who are heterozygous for the H/h gene have normal blood clotting, but are called carriers because they can pass the recessive allele on to their offspring
Type of problem- Sex-linked
A)A normal man marries a woman who is a carrier. If they have 4 boys, what is the chance that one with be a hemophiliac? If they had 4 girls, what is the chance that one will be a hemophiliac?
B)Is it more common for male or for female offspring of a carrier to be hemophiliacs? Why?
C)A kind with hemophilia married a normal woman who is not a carrier. They have two princes and two princesses. What proportion of each sex is expected to have hemophilia? What proportion of each sex are expected to be carriers?
Type of problem- Sex-linked
A)A normal man marries a woman who is a carrier. If they have 4 boys, what is the chance that one with be a hemophiliac? If they had 4 girls, what is the chance that one will be a hemophiliac?
B)Is it more common for male or for female offspring of a carrier to be hemophiliacs? Why?
C)A kind with hemophilia married a normal woman who is not a carrier. They have two princes and two princesses. What proportion of each sex is expected to have hemophilia? What proportion of each sex are expected to be carriers?