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Some women have three, four, or even five X chromosomes per cell. Some women have only one. Some men can also have two or more X chromosomes, in addition to their Y. It's even possible to be biologically female and have the karyotype XY, or be biologically male with an XX karyotype.
The gene for 5-alpha reductase (the male pattern baldness gene) has been mapped to chromosome 5, not the Y chromosome. That means you can get it from any of your ancestors, it just won't show up in the women.
Turns out when I was but a wee little egg, an SRY gene got tagged onto my X chromosome and I got hoodwinked into a dudes body. Unfortunately enough, I also learned that isn’t really linked with transness. Many men with two X chromosomes are perfectly secure in their gender so I’ve apparently been double hoodwinked…
18 lip 2024 · Animal sex chromosomes typically carry the upstream sex-determining gene that triggers testis or ovary development and, in some species, are regulated by global dosage compensation in response to...
In humans and many other animal species, sex is determined by specific chromosomes. How did researchers discover these so-called sex chromosomes? The path from the initial discovery of sex ...
2 lut 2022 · Triple X syndrome, also called trisomy X or 47,XXX, is a genetic disorder that affects about 1 in 1,000 females. Females normally have two X chromosomes in all cells — one X chromosome from each parent. In triple X syndrome, a female has three X chromosomes.
28 maj 2024 · The X chromosome was the first human chromosome to be completely sequenced with no gaps or missing pieces! Scientists published the complete X chromosome sequence in 2020, three years before the Y chromosome — the last human chromosome to be completely sequenced — was finished in 2023.
