Cedrick
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a couple who have no children seek genetic counseling because the husband's two brothers died in their teens of Duchenne muscular dystrophy
Wich of the following best describes the husbands risk of being a carrier of Duchenne muscular dystrophy ?
a.-O
b.-1/4
c.-1/3
d.-1/2
e.-3/4
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| robin082006
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Duchenne is X-linked resessive. Because the husband is phynotypically normal--> A
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| Cedrick
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Really ?
I Thought 25% {1/4} Choice B
Ok Dr
Thanks
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| mjl1717
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x linked recessive means that the mother would have to transmit it {XX'} for a child to get it. So the risk is 0. I dont even think the father is a carrier since he recieved the UNAFFLICTED X chromosome {im trying to reason out these genetic calculations}
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| Cedrick
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Thanks for the rationale
choice A
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| sridevibandaru24
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A
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