hemophilia is a sex linked recessive disease. Dick does not have hemophilia. His wife Debi is a heterozygote. They are having fraternal twins, one of each sex, who they have named Dick Jr. and Debi Jr. What are the chances of Dick Jr. having hemophilia? Debi Jr.?
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hemophilia is a sex linked recessive disease. Dick does not have hemophilia. His wife Debi is a heterozygote. They are having fraternal twins, one of each sex, who they have named Dick Jr. and Debi Jr. What are the chances of Dick Jr. having hemophilia? Debi Jr.?
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- Hemophilia is a sex-linked recessive trait. A male hemophiliac and phenotypically normal female have a son with hemophilia. They would like to have one more child. What is the probability of having a child without hemophilia? Explain using a Punnett square. Is it possible for a girl to be born with hemophilia? Explain.A couple is both heterozygous for the autosomal recessive disease cystic fibrosis (CF). What is the probability that their first child will either be a girl or have CF but not both?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”)
- Bob and Joan know from a blood test that they are each heterozygous (carriers) for the autosomal recessive gene that causes sickle cell disease. If their first three children are healthy, what is the probability that their fourth child will have the disease?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?At her first prenatal visit, a woman relates that her maternal aunt has cystic fibrosis, an autosomal recessive illness. Which of the following statements is appropriate for the nurse to make? a. It is unnecessary for you to worry since our aunt is not a direct relation." b. "We can check to see whether or not you are a carrier for cystic fibrosis." c. "You should have an amniocentesis to see whether or not your child has the disease." d. Please ask your mother whether she has ever had any symptoms of cystic fibrosis
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