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Principles of Inheritance and Variation
Sex Determination: Probability
1 question from 1 paper, each with its answer.
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Concepts tested
- Independent probability of each birth
All Questions
2001 AIPMT 1 question
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Probability of four sons to a couple is : -In humans, the probability of each child being a son is $\dfrac{1}{2}$, because the father's sperm carries X or Y in equal numbers.
Each birth is independent, so the probability of four sons in four births is $\left(\dfrac{1}{2}\right)^4$.
$= \dfrac{1}{16}$