Homogametic sex

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Homogametic sex refers to the gender of a species in which both sex chromosomes are identical. For example, in humans, females, with two X sex chromosomes, would be referred to as the homogametic sex while males, with one X and one Y sex chromosomes, would be referred to as the heterogametic sex. Conversely, in birds, males, with two Z sex chromosomes, are the homogametic sex while females, with one Z and one Y chromosome, are the heterogametic sex.


See also: chromosome, diploidy, nondisjunction, meiosis, sex-determination system

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