Males typically have two different kinds of sex chromosomes (XY), and are called the heterogametic sex. In humans, the presence of the Y chromosome is typically responsible for triggering male development; in the absence of the Y chromosome, the fetus will undergo female development.
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Males typically have two different kinds of sex chromosomes (XY), and are called the heterogametic sex. In humans, the presence of the Y chromosome is typically responsible for triggering male development; in the absence of the Y chromosome, the fetus will undergo female development.