>>10646134The Y chromosome carries only a small amount of content DNA, mostly just that required to make male parts instead of female ones. But it has a wildly outsized role in DNA regulation, determining which genes are turned on and off, which is itself passed down to children.
This means that women have a mixed DNA regulation/activation profile between both of their parents equally, while males have their father's profile spread out across their entire genome, overwriting the pattern of activations and deactivations pre-existing on the mother. Since everyone has four grandparents, eight grandparents and so on, this extends to overall mean that DNA regulation patterns are predominantly enforced from the father's side.
This forms an important counterbalance with the X chromosome, which is a regulatory dwarf but a content giant. In women, their two X chromosomes balance out the same way as the autosomal pairs. But in men, the X is almost unopposed by the tiny Y, yet also massively regulated by it. So a pattern forms in men and women:
Women: balanced hybrid of the general traits of both parents.
Men: genetic substance has a lean towards the mother, but regulated to resemble the father.
To strike a simple analogy, it's like men are made of the same substance as their mum, but dad shaped. While women are balanced evenly.
Similarly, for an entire population where a community of males takes over and breeds with females, establishing chiefly their Y chromosome across the populace: The nation will retain its general substance but become shaped like the male takeover group.
