00:01
No, normal humans have two sex chromosomes, either two x's, which means you have a female, or an x and a y, which means you have a male.
00:12
Now, what if you have a different number of chromosomes? there can be a mistake in meiosis easily, and you may end up with an extra chromosome.
00:23
If you end up with an extra x, it makes sense that that offspring would be female, because two x's is female, so adding another x should not change that.
00:37
However, what if you end up with x, x, y? so it was going to be a normal male, x, y, but somehow an extra x was thrown in there by mistake...