<iframe width="580" height="385" src="https://www.youtube.com/embed/RGN-E8t1FL4?autoplay=1" frameborder="0" allowfullscreen></iframe> <br>Shorts Look, this is a ladies egg - which only contains the X chromosome and fuses with this egg from the gents sperm cell which ... <br><a href="https://www.youtube.com/watch?v=RGN-E8t1FL4">source</a>