Why sex and gender aren't binary issues | DW | 31.03.2021Sex is a spectrum, not binary; genetics play a complex role in determining sex, leading to variations in physical traits and chromosomes.
The complete sequence and comparative analysis of ape sex chromosomes - NatureTherian X and Y chromosomes originated from autosomes; Y evolved with SRY, palindromes, and deleterious mutations, diverging in size and gene content from X chromosome.