Destroyer Error?

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DrRoyal Pains

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10+ Year Member
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Question 185 in the biology section. Shouldn't the answer be 25%? Or am I missing something? To be AB, you need both surface proteins (AB), not iA, iB, or ii. Romano says the answer is 100%?
 
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A man with type A blood has children with a woman of type B. If both are assumed to be heterozygous, what is the probability of an AB child?

25%, you're right

Offspring has a chance to become any of the 4 blood types - 25% each

AO (Phenotype A)
BO (Phenotype B)
AB
OO

Yes. This was an error I remember that.
 
A man with type A blood has children with a woman of type B. If both are assumed to be heterozygous, what is the probability of an AB child?

Type A Heterozygous = iA, Type B Heterozygous = iB

Edit: Oopsie, sorry. I thought you were saying you thought the answer was 100%. Yea it's definitely 25%.