Find out the differences between xx and xy chromosomes, and how they relate to gender identity and sexual orientation. Learn how sex chromosomes determine the sex of humans and other organisms, and why men cannot have yy pairs Find out the important genes on x chromosome and the consequences of xyy syndrome. It is often assumed that women have xx chromosomes and men have xy, but biology is more complex Some women have xy chromosomes — a natural variation in sex development. Learn how the xy system determines the sex of many mammals, including humans, based on the presence or absence of the y chromosome
Learn how the x and y chromosomes carry instructions that decide our biological sex, and how intersex people have both masculine and feminine body parts Find out how the x and y chromosomes were discovered and what they do. Xx and xy chromosomes are only part of the story Discover how sex chromosomes vary naturally and why biological sex isn't always binary Learn about dsds and intersex variations. Sex chromosome, either of a pair of chromosomes that determine whether an individual is male or female
In humans the sex chromosomes consist of one pair of the total of 23 pairs of chromosomes.
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