[rofrol]

In mammals, which includes humans, the Y chromosome carries a gene (SRY) that encodes a testes-determining factor. If an individual has a Y chromosome with a functional SRY gene, they will develop testes and therefore will be biologically male. Absent a Y chromosome and functional SRY gene (unless the SRY gene has been transposed to an X chromosome), an embryo will develop ovaries and will therefore be biologically female. What’s important to note is that the presence of a Y chromosome, or two, or three, etc., all result in the development of testes and therefore these individuals are biologically male. Likewise, individuals with additional or fewer X chromosomes, in the absence of a Y, all develop ovaries and are therefore biologically female.

With this in mind, the chart in the above tweet can more accurately be rewritten as:

- X – Female
- XX – Female
- XXY – Male
- XY – Male
- XYY – Male
- XXXY – Male

So no, these different chromosomal compositions are not new sexes, but rather represent natural variation within males and females. To illustrate by way of analogy, a person with Klinefelter syndrome (47, XXY) isn't a new sex in the same way that a person with Down's syndrome (who have 3 instead of 2 copies of chromosome 21) isn't a new species.

https://www.realityslaststand.com/p/sex-chromosome-variants-are-not-their

#trans #lgbt #lgbtq #transeksualista #gender #plec