The End of Men? Male Sex chromosome is slowly disappearing

[Crash2Parties]

34. Just to clarify one point, pedantic as it may be?

"Although it carries the “master switch” gene, SRY, that determines whether an embryo will develop as male (XY) or female (XX),"

The SRY gene merely triggers certain specific sex dimorphic sites (ranging from reproductive to skeletal to neural to endocrine) to begin to develop as typical for a male. Then an inhibitor gene has to kick in, and a second inhibitor must be expressed to stop the first. The entire chain must occur for that given body site to develop as what is typically categorized as "male" (because most people labelled as such have that particular configuration).

SRY can and does transpose onto other genes, sometimes resulting in men with SRY and male sex dimorphic body sites that are XX, btw. So, technically that Y really is not needed so long as another mechanism is worked out by nature to ensure genetic mixing within the species.