Learn about the xx and xy chromosomes, the sex determination system, and other chromosome combinations. In this system, the sex of an individual usually is determined by a pair of sex chromosomes Typically, females have two of the same kind of sex chromosome (xx), and are called the homogametic sex. You probably remember this legendary illustration in a biological textbook Sex chromosome (chromosome) is a microscope, female is xx and male is xy. The female has two x chromosomes, and all female egg cells normally carry a single x.
The thing is, xx and xy chromosomes aren’t cut and dry, either Actually, sex chromosomes and genetic expression vary widely, beyond a penis/vagina or xy/xx binary Xx and xy with the aforementioned expressions are the most common sex chromosomes and corresponding organs, but they’re not the only ones. 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.
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.
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