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 Online Tutoring : Forum : Homework Help - Biological & Medical Sciences : Biology
Topic Topic: HELP ME PLEASE Post ReplyNew Question
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Joined: 03 March 2007
Posts: 1
Posted: 03 March 2007 at 4:11pm | IP Logged Quote Chelle

Most known X-linked diseases are recessive. Hypertrichosis, a disease in which there is generalized hairiness covering the whole body, is extremely rare, caused by an X-linked dominant gene. Use H for dominant allele, h for recessive allele. Explain answers.
     a. Irene has the disease; what is her genotype?
     b. What is the likelihood that Irene inherited the disease from her father?
     c. If Irene has a son, what is the probability he will have the disease?
     d. What is the probability that a daughter will have the disease?
I think the genotype would be Hh becuase this disease only needs one carrier to be expressed

On b I think the answer is 50% because her mother and father could be a carrer

On C I say 50 % because???? I really don't know how to explain

On D i also say 50% because the mother is afftected and that makes the daughter more likely to have it

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