John and Mary both have normal-colored skin, but they both have one parent who w

Question

John and Mary both have normal-colored skin, but they both have one parent who was albino. J Mary are about to have a child ohn and a. What is John's genotype? What is Mary's genoty pe? b. What is the chance the child i normal albino: c. They have a second child. What is the chance the child is normal albino: d. Wow! Pregnant again, but this time it's frstermal (not identical) twins What is the chance that BOTH children are homal albino: 3. Bill has Huntington Disease, an autosomal dominant disease. Bill's father also had it, but there is no history of the condition in his mother's family. There is also no history of the condition in Bill's wife's family. Bitl and his wife have two children a. Wha t is the genotype of Bill and his wife? b. What is the chance both children have HD? c. What is the chance both children are normal? d. What is the chance one is normal and the other has HD?

Explanation / Answer

2)

a. Jhons genotype - Aa

Marrys genotype - Aa

b. Normal - 75%

albino - 25%

c. Normal - 75%

albino - 25%

d. Normal - 75%

albino - 25%

3)

a. Bill - Aa ; wife - aa

b. 50%

c. 50%

d. 50% - Normal

50% - affected with HD

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