Biology
A newly married couple are expecting their first child. What is the probability of them having a daughter?
- 10%
- 50%
- 75%
- 100%
Genetics
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Answer
50%
Reason — A mother always gives an X chromosome, and the father can give either X or Y. If the father gives X, the child is a girl (XX). If he gives Y, the child is a boy (XY).
So, there's a 50% chance of having a daughter.
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