/sci/ - Science & Math

>>16069259
why bother posting?

>>15931356
>repeating the joke

>>15900520
>gonzalez pasterski
>poo/white

>>14637118
>>14637209

What is this theory called?

Ok so let's have a nice recap, featuring your resident expert.

There are two genders. There are two sexes. The expression of gender (essentially your phenotype of masculinity/femininity as defined by a range of genes but primarily XX and XY) was inextricable from your chromosomal makeup until recently with the advent of hormone supplements and genital deformation surgeries and whatnot, which gave rise to the notion that since it is malleable with technology, it must mean nothing to begin with. This is of course, false. Sex in humans is determined by the presence or absence of a Y chromosome. The gene products on the second X chromosome in women are downregulated throughout their lives, essentially leaving them with one X chromosome which determines their development, and so the genes of Y develop and create what a man is while the X genes are produced simultaneously, delineating the two sexes early in development.

What IS on a spectrum: masculinity and femininity. They have environmental factors and a range of genes not on the X/Y chromosomes determining them (eg amount of HGH helping to determine height/frame and so on).

What is NOT on a spectrum: sex. You either have a Y or you do not.

Aberrations of the male and female dichotomy are created due to unusual amounts or combinations of genes/chromosomes, and their phenotypes are based on the sex dichotomy itself. Something like Kleinfelter's is an XXY male who ends up being more feminine, for example. There is no third fourth or eight millionth gender; how many kinds of gamete exist? Right, two. If you lacked all external sexual features and any X/Y you'd be a female by default and by definition because you merely lack a Y chromosome.