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A mother is Rh heterozygous dominant and the father Rh homozygous recessive. What are the chances that the baby will develop the Rh disease?
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- A form of hemophilia is caused by a sex-linked (X-linked) recessive gene. A phenotypically normal woman whose father had hemophilia marries a man who suffers with hemophilia. What is the probability that their first daughter will have hemophilia?A person with type O blood is married to a person with type A blood (unknown genotype). They have 6 children, 3 of them have type A blood, three of them have type O blood. What is the genotype of the two parents?A woman has type O blood. Her child has type O blood. Could a man with B blood type be the father?
- An individual that is genetically male develops as a female. Is this individual more or less likely to express an X-linked recessive disorder than an average female?Hemophilia is due to a sex-linked gene. It is recessive and found on the X chromosome. A woman who is a carrier for hemophilia marries a normal man. What will be the possible phenotypes of their children? (use the letter “H”)A child with the "B positive” blood type is known to be a heterozygote at both the ABO blood type gene and also the Rh blood type gene. What is the genotype of this child at these two genes?
- If a male has fragile X syndrome, is his mother or father more likely to be a carrier for the disease? Why?A man with X-linked color blindness marries a woman with no history of color blindness in her family. The daughter of this couple marries a normal man, and their daughter also marries a normal man. What is the chance that this last couple will have a child with color blindness? If this couple has already had a child with color blindness, what is the chance that their next child will be color blind?A couple are both phenotypically normal but their son suffers from hemophilla, a sex linked recessive disorder. What fraction of their children are likely to suffer from hemophilia. what fraction are likely to be carriers.
- Why are males affected by X-linked disorders much more oftenthan females?A man with hemophilia, an X-linked recessive genetic disease, marries a woman who is a carrier for the same disease. What is the chance that one of their daughters will have hemophilia? A) 0% B) 25% C) 50% D) 75% E) 100%A phenotypically normal man, who has a hemophiliac brother, marries a normal woman, who is not a carrier. What is the probability that any of their children will be hemophiliac?