6. Lois and her husband Clark have passed on to their daughter three unusual tra

Question

6. Lois and her husband Clark have passed on to their daughter three unusual traits: X-ray vision, sensitivity to kryptonite and the ability to leap tall buildings at a single bound When Clark was a child he recalls learning from his father, Jor-el, that these traits are all autosomal dominant. Their daughter marries a normal earthling and they are concerned that their grandchildren will inherit these genes. What is the probability of this occurring for the following 3 situations: a) all three traits b) x-ray vision and sensitivity to kryptonite, but can only leap fire hydrants c) none of the traits

Explanation / Answer

If the trait is autosomal dominant, then one copy of the gene carrying the trait will be enough to produce these trait.

lets assue that these three traits are represented by x,y, and z

then the genotype of their daughter will have one gene carrying the traits either AxyzA

when the daughter is married to a normal person having the genotype AA

Axyz

A

A

Axyz A

AA

A

Axyz A

AA

a)in 50% cases the childrens will carry all thee traits

b) no prbability of of X ray vision and sensitivity to kryptonite, but can only leap fire hydrants,

c) 50% probability of having no trait

Axyz

A

A

Axyz A

AA

A

Axyz A

AA

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