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Sex chromosomes are the genetic elements that define a person's biological sex You can read more about various genetic conditions that can result in such conditions in chapter 8 and here Learn about the xx and xy chromosomes, the sex determination system, and other chromosome combinations.
In this system, the karyotypic sex of an individual is usually determined by a pair of sex chromosomes Note that there are exceptions in which xy does not produce males and xx does not produce females Typically, karyotypic females have two of the same kind of sex chromosome (xx), and are called.
The female has two x chromosomes, and all female egg cells normally carry a single x.
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. Without an sry, an embryo will develop as a female instead of as a male whether it has a y chromosome or not
Beyond the binary there are more than just two possible sexes for which the chromosomes can carry instructions While most people are typical xy males or xx females, many people are intersex. 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 This simple combination plays a significant role in sexual differentiation
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