February 25th, 2009 | by admin |
Open Question: Genetic problems!! please help…i have an exam soon!!?
1.A boy has hemophilia. Neither his parents nor his grandparents have the disorder. What are the possible genotypes and phenotypes of:
a. the boy?
b. his parents? Mom =
Dad =
c. his grandparents? Maternal = Paternal =
d. If this boy grows up and marries his 3rd cousin who is a carrier, what is the probability they will have children with hemophilia?
2.What are the chances of a child having AB blood if one of the parents is heterozygous for A blood (IAi) and the other is heterozygous for B (IBi) ?
What other genotypes are possible?
Recall: Heterozygous = IA i or IB i
3.In humans, hypercholesterolemia is inherited by incomplete dominance. The allele HC calls for abnormally high levels of cholesterol in the blood; the allele HN = normal levels.
HC HC persons usually die of a heart attack early in life.
HN HN persons are phenotypically normal.
When 2 HC HN individuals marry, what is the
probability that a given child will have the more
serious form of the disease?
The milder form?
Be completely normal?
Could HC HN x HN HN produce a severely diseased baby?
Wed, 25 Feb 2009 07:30:17 GMT
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