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Asked by csanders88 - 3 years ago
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joensf Level 82
Answered 3 years ago
The Smiths have four children, all girls. Their fifth child is a boy. Why did this change occur?

A) the father' contribution of a Y chromosome.
B) the conception classes taken by the parents.
C) the mother' contribution of a Y chromosome.
D) the timing of the fertility cycles.

3 years ago
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Meklar Meklar
Best Answer - Chosen by Voters
The answer in this case happens to be A. But really, you ought to do your own're not going to learn otherwise!

Because one of Mr. Smith's sperm, carrying a Y chromosome, fertilized his wife's egg.

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this is correct

This happens all the time

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labarca Level 69
Answered 3 years ago
Mr. Smith's Y carrying sperm out swam all his rivals
and fertilized Mrs. Smith's egg.
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Gumboy Level 55 / fun guy
Answered 3 years ago
The 'Law of Averages' could explain it, since the random probability
for the fifth being male is p(5) = 1 in 2⁵, or 1 in 32.
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