|Posted: 03 March 2007 at 4:11pm | IP Logged
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