In humans, which gamete contributes the chromosome that determines sex?

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Multiple Choice

In humans, which gamete contributes the chromosome that determines sex?

Explanation:
Sex is determined at fertilization by which sex chromosome the sperm brings. The egg always contributes an X, while the sperm can carry either X or Y. If a sperm with X fertilizes the egg, the result is XX (typically female). If a sperm with Y fertilizes the egg, the result is XY (typically male). So the chromosome that determines sex comes from the sperm—the presence of a Y in the fertilizing sperm directs male development, whereas the absence of Y (egg’s X plus sperm’s X) leads to female development.

Sex is determined at fertilization by which sex chromosome the sperm brings. The egg always contributes an X, while the sperm can carry either X or Y. If a sperm with X fertilizes the egg, the result is XX (typically female). If a sperm with Y fertilizes the egg, the result is XY (typically male). So the chromosome that determines sex comes from the sperm—the presence of a Y in the fertilizing sperm directs male development, whereas the absence of Y (egg’s X plus sperm’s X) leads to female development.

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