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Sex chromosomes are the genetic elements that define a person's biological sex Meiosis close meiosisreduction division in a cell in which the chromosome number is halved from diploid to. Learn about the xx and xy chromosomes, the sex determination system, and other chromosome combinations.

In the xx/xy system, karyotypic females usually have two x chromosomes (xx), while karyotypic males usually have a single x and a single y chromosome (xy). This simple combination plays a significant role in sexual differentiation. Females receive two x chromosomes, represented by xx

Males receive an x and a y chromosome, represented as xy

But where do the x and the y come from Like all chromosomes, the x and y chromosomes that determine gender are passed from parents to offspring To understand how this happens, let’s look at a special type of cell division called. 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. Recall that for most genes everyone has two copies—one on each chromosome But for males, there is no second copy of genes on the singular x chromosome or the singular y chromosome

This means that if a gene on a sex chromosome is defective or different, males have no second copy to.

Sex determination sex determination involves the x and y chromosomes Females have two x chromosomes (xx) Males have one x and one y chromosome (xy) The presence of the y chromosome triggers male development

The absence of the y chromosome leads to female development

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