/sci/ - Science & Math

>>12238274
Note that the male population size is half that of the women for most of history, then things get crazy in the neolithic/bronze age.

>>12124954
The statistic is wrong, it refers to the Y Chromosome bottleneck that occurred during the neolithic expansion.

>The temporal sequence of the maleNedeclinepatterns among continental regions (Supplemental Fig. S4B) isconsistent with the archaeological evidence for the earlier spreadA recent bottleneck of Y chromosome diversity of farming in the Near East, East Asia, and South Asia than inEurope (Fuller 2003; Bellwood 2005). A change in social structuresthat increased male variance in offspring number may explain theresults, especially if male reproductive success was at least partially culturally inherited (Heyer et al. 2005)

Neolithic tribal groups expanded, fucked local bitches while sowing wheat.

https://pubmed.ncbi.nlm.nih.gov/25770088/

>>10772845
Around the time of the neolithic revolution there was a sudden explosion of Chad Thundercocks. For every 17 women who reproduced and contributed to todays humanity, 1 man also did so. It's probably explained by an large increases in violence/wars, the Ghengis Khan effect.
Mitochondrial haplotypes tend to not move very much, whereas there is turnover of Y-chromosome haplotypes as invaders move around. "Star shaped expansions" are a euphemism for this - group arrives out of nowhere and starts fucking the women in the area, then spread out. The patterns of Y chromosome haplotypes appear like a star eplosion.