A male child inherits his X chromosome from which parent?

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Multiple Choice

A male child inherits his X chromosome from which parent?

Explanation:
The main idea here is how sex chromosomes determine inheritance. Females have two X chromosomes (XX) and males have one X and one Y (XY). The mother's egg always carries an X chromosome. The father's sperm can contribute either an X or a Y chromosome, and that choice sets the baby's sex. If the sperm contributes a Y, the child is male (XY); if it contributes an X, the child is female (XX). Since a male child ends up with only one X chromosome, that X must come from the mother. The father's contribution to a son is the Y chromosome, which does not provide an X.

The main idea here is how sex chromosomes determine inheritance. Females have two X chromosomes (XX) and males have one X and one Y (XY). The mother's egg always carries an X chromosome. The father's sperm can contribute either an X or a Y chromosome, and that choice sets the baby's sex. If the sperm contributes a Y, the child is male (XY); if it contributes an X, the child is female (XX). Since a male child ends up with only one X chromosome, that X must come from the mother. The father's contribution to a son is the Y chromosome, which does not provide an X.

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