Unrelated, related
It's been an excellent day. Unrelated, tonight my thoughts return to this awe-inducing piece of science: as we know, the majority of assigned at birth females have two X-choromosomes in their cells, while the majority of assigned at birth males have one X-chomosome and one Y-chromosome in each cell. (minus reproductive cells.) In the double X biology, in each cell one of the X-chromosomes (mostly) switches off. Which one, that seems to be random. A consequence of this is a fascinating mixing of inherited characteristics in each double X-ed individual. Meanwhile, each XY-individual has inherited one X-chromosome from their biological XX-parent. That will be half of the X-c.s the XX-parent posses themselves. Which means, they will have inherited an "exact" X-c. from either of their grandmothers! Which is often noticeable in the XY person within the family, as there will be shared characteristics, both visible and otherwise. I'm not going to lie, things like this feel e...