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Sex Sounds Soundboard
Most mammals have the XY sex-determination system, where male mammals carry an X and a Y chromosome (XY), while female mammals carry two X chromosomes (XX) During sexual reproduction, male and female gametes fuse to form zygotes, which develop into offspring that inherit traits from each parent.
See also: Sex (disambiguation), Anal sex, Oral sex, Sex position, Same-sex marriage, Sexual intercourse.