6. In humans, hemophilia is a sex linked trait. Females can be normal, carriers, or have the disease. Males will either have the disease or not (but they won’t ever be carriers) = female, normal = male, normal = female, carrier = male, hemophiliac = female, hemophiliac Show the cross of a man who has hemophilia with a woman who is a carrier. What is the probability that their children will have the disease? _______________ 7. A woman who is a carrier marries a normal man. Show the cross. What is the probability that their children will have hemophilia? What sex will a child in the family with Hemophilia be? 8. A woman who has hemophilia marries a normal man. How many of their children will have hemophilia, and what is their sex? 9. In cats, the gene for calico (multicolored) cats is codominant. Females that receive a B and an R gene have black and orange splotches on white coats. Males can only be black or orange, but never calico. X B X R Here’s what a calico female’s genotype would look like. Show the cross of a female calico cat with a black male? _______________ What percentage of the kittens will be black and male? _______________ What percentage of the kittens will be calico and male? _______________ What percentage of the kittens will be calico and female? 10. Show the cross of a female black cat with a male orange cat. _______________ What percentage of the kittens will be calico and female? _______________ What color will all the male cats be?
6. In humans, hemophilia is a sex linked trait. Females can be normal, carriers, or have the disease. Males will either have the disease or not (but they won’t ever be carriers) = female, normal = female, carrier = female, hemophiliac = male, normal = male, hemophiliac Show the cross of a man who has hemophilia with a woman who is a carrier. What is the probability that their children will have the disease? _______________ 7. A woman who is a carrier marries a normal man. Show the cross. What is the probability that their children will have hemophilia? What sex will a child in the family with Hemophilia be? 8. A woman who has hemophilia marries a normal man. How many of their children will have hemophilia, and what is their sex? 9. In cats, the gene for calico (multicolored) cats is codominant. Females that receive a B and an R gene have black and orange splotches on white coats. Males can only be black or orange, but never calico. Here’s what a calico female’s genotype would look like. X B X R Show the cross of a female calico cat with a black male? What percentage of the kittens will be black and male? _______________ What percentage of the kittens will be calico and male? _______________ What percentage of the kittens will be calico and female? _______________ 10. Show the cross of a female black cat with a male orange cat. What percentage of the kittens will be calico and female? _______________ What color will all the male cats be? _______________