Having more than one kind of sex chromosome (or gamete)


In humans, males are naturally heterogametic because they possess two types of sex chromosome: X-chromosome and Y-chromosome.

In gamete production, the males produce spermatozoa, each containing one sex chromosome, which may either be X or Y-chromosome. Thus, they also have two types of gametes: a sperm carrying the X-chromosome and another with the Y-chromosome.

Word origin: Greek héteros (other, different) Compare:

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