Search results
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.
I think an important difference to recognize is what I understand is the difference between sex and gender. Sex is determined by chromosomes. So you have XX (female), XY (male) and other mutations/combinations (intersex). I believe gender is the "phenotype" as in how you act, feel, etc.
XX males that are SRY-positive have two X chromosomes, with one of them containing genetic material (the SRY gene) from the Y chromosome; this gene causes them to develop a male phenotype despite having chromosomes more typical of females. [2]
14 gru 2023 · Sex chromosomes are chromosomes that affect your sexual anatomy and reproductive development. Most of us were raised with the idea that there are two sexes: male and female.
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 sie 2016 · One small but interesting line of evidence lies in the platypus, which encodes a whopping 10 sex chromosomes (males are XYXYXYXYXY instead of XY – apparently, size matters to platypodes) that bear great similarity to the bird Z chromosome, but technically operate under XY sex determination rules.
