Question

Biology

Posted 5 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 5 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 $(1/2) \times (1/2) \times (1/2) = 1/8$

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 $(1/2)^3 = 1/8$.

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