The X and Y chromosomes are not girl chromosomes and boy chromosomes

[pokerfan]

PZ Myers....

The X and Y chromosomes are not girl chromosomes and boy chromosomes, respectively. There is a bizarrely essentialist approach to these concerns that even scientists sometimes take, and it’s infuriatingly wrong.

The X is dubbed the ‘female chromosome’, takes the feminine pronoun ‘she’, and has been described as the ‘big sister’ to ‘her derelict brother that is the Y’ and as the ‘sexy’ chromosome. The X is frequently associated with the mysteriousness and variability of the feminine, as in a 2005 Science article headlined ‘She Moves in Mysterious Ways’ and beginning, ‘The human X chromosome is a study in contradictions’. The X is also described in traditionally gendered terms as the more ‘sociable’, ‘controlling’, ‘conservative’, ‘monotonous’, and ‘motherly’ of the two sex chromosomes. Similarly, the Y is a ‘he’ and ascribed traditional masculine qualities – ‘macho’, ‘active’, ‘clever’, ‘wily’, ‘dominant’, and also ‘degenerate’, ‘lazy’, and ‘hyperactive’.”

None of that is true. The X and Y have different genetic properties and evolutionary histories, but they do not define the entirety of your sex. The Y has a little trigger on it that activates a cascade of gene activities on all the autosomes and also the X chromosome that generate ‘maleness’, whatever that is; ‘femaleness’ is likewise the product of complex patterns of gene activity that are spread throughout the entire genome. Sex is most definitely multigenic, and every gene that has differential sexual effects is wildly pleiotropic.

More: http://freethoughtblogs.com/pharyngula/2016/04/04/we-should-all-be-outraged-at-the-misuse-of-science-against-women/

[greiner3]

1. The Y is the X chromosome that lost one leg

All human embryos have a vagina but it is the expression of testosterone that the unvagination closes and then goes on to form the penis and testes. It seems we are not only all Aftican but at least for a month or so all female