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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.
XX and XY chromosomes are not what determines a person's sex - as others have explained, there are many exceptions to that generalisation ... a person's biological sex is determined by the gonads which are present at birth.
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...
27 lip 2023 · discussions in r/TwoXChromosomes. Grown-ass men that don’t understand how consent works. (self.TwoXChromosomes) submitted 1 year ago by Xallia_Yevatell. Just listened to two adults discussing how they think it’s a perfect idea to have a woman sign a piece of paper as a means of giving consent.
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 ...
26 paź 2020 · In fact, sex chromosomes — and how those chromosomes translate into physical features — can vary in quite a few ways. Here’s what’s regarded as the “norm”: XY chromosomes = penis & testes = man. XX chromosomes = vagina & ovaries = woman. Gender is subjective to each person, and sex organs don’t dictate gender.
