If you have the XX sex chromosome pair then you’re a girl; if you have the XY sex chromosomes, you’re a boy…
https://www.youtube.com/watch?v=h4_eSW6D6sc
If you have the XX sex chromosome pair then you’re a girl; if you have the XY sex chromosomes, you’re a boy…
https://www.youtube.com/watch?v=h4_eSW6D6sc
Great video!!! BTW I was originally from Stoke on Trent so another Neal from Stoke on Trent 🙂