Define Sex

“Sex” refers to the biological characteristics that distinguish males and females in any species. In humans, sex differences begin with the chromosomal patterns that distinguish males and females – with males usually having one X and one Y chromosome and females having two X chromosomes. From these fundamental genetic differences, other sex differences in humans arise, such as different reproductive organs, hormones, and proportions of fat to muscle.  There are also differences between female and male bodies, such as body hair, that are referred to as secondary sex characteristics.   Another example of secondary sex characteristic differences is the larger vocal cords and deeper voices of males as compared with females.

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