Homework Help: biology

Posted by sushk on Wednesday, July 20, 2011 at 12:48pm.

hemophilia is a sex linked recessive disorder. A man who has a hemophilia has a daughter who has a normal phenotype. She marries a man who also does not have hemophilia. what is the chance that they will have a daughter who has hemophilia? what chance will their son have inheriting hemophilia. if the couple has 4 sons . What is the probability that 4 boys will have hemophilia? show work by using punett squarehemophilia is a sex linked recessive disorder. A man who has a hemophilia has a daughter who has a normal phenotype. She marries a man who also does not have hemophilia. what is the chance that they will have a daughter who has hemophilia? what chance will their son have inheriting hemophilia. if the couple has 4 sons . What is the probability that 4 boys will have hemophilia? show work by using punett square

biology - PsyDAG, Thursday, July 21, 2011 at 2:24am
A sex-linked gene is on the X chromosome, and XX makes a girl. The daughter, getting the hemophilia gene from dad, is a carrier.

Since her husband can only give a normal X chromosome, the most her daughters could be is carriers, but by chance, half of the boys will have hemophilia.

Probability of all events occurring is found by multiplying the probability of the individual events.

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