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Question
Biology
Posted 8 months ago
albinism and humans is inherited as a simple, recessive trait. A normal male and an albino female have a son who is albino. They plan to have three more children, what is the probability all the children will be albino?
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Answer from Sia
Posted 8 months ago
Answer
The probability that all three children will be albino is 1/8 or 12.5%.
Solution
a
Albinism is a recessive trait, meaning that an individual must inherit two copies of the recessive allele (aa) to express the trait
b
The normal male (Aa) and the albino female (aa) can produce offspring with the following genotypes: Aa (carrier) and aa (albino)
c
The probability of each child being albino (aa) is 1/2
d
The probability that all three children will be albino is calculated as (1/2)×(1/2)×(1/2)=1/8(1/2) \times (1/2) \times (1/2) = 1/8
Key Concept
Recessive inheritance
Explanation
Albinism is inherited in a recessive manner, requiring two copies of the recessive allele for the trait to be expressed. The probability of each child being albino is 1/2, and the combined probability for three children is (1/2)3=1/8(1/2)^3 = 1/8.

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