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Question
Biology
Posted 12 months ago

If two carriers (heterozygotes) have children, the probability that their first two children are affected by the trait is

Group of answer choices
1/161 / 16
1/41 / 4
3/43 / 4
15/1615 / 16
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Answer from Sia
Posted 12 months ago
A
Key Concept
Probability of inheriting a recessive trait
Explanation
When two heterozygous carriers (Aa) have children, the probability of each child being affected by a recessive trait (aa) is 1/41/4. The probability that both of their first two children are affected is (1/4)×(1/4)=1/16(1/4) \times (1/4) = 1/16.

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