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). The other 22 pairs of chromosomes are called autosomes Individuals having two x chromosomes (xx) are female Individuals having one x chromosome and one y chromosome (xy) are male The x chromosome resembles a large autosomal chromosome with a long and a short arm
The y chromosome has one long arm and a very short second arm. The x chromosome is larger than y because it carries more instructions The x chromosome has some instructions to make body parts that all people have, and others for body parts that only females have A karyotype is a complete set of chromosomes from an organism or species This is a human male karyotype In the red box, you see the sex.
Discover how sex chromosomes vary naturally and why biological sex isn't always binary Learn about dsds and intersex variations. Cracking the code to sex and genetics Understand how these chromosomes influence your biology and health.
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