Dentista08

looking for a practice!
10+ Year Member
5+ Year Member
Jul 25, 2008
228
0
Boston, MA
Status
Dental Student, Dentist
How come sperm cell does not contain X chromosomes?

i don't get this?
It does! 50% of the time though. Sperm either contain Y OR X and when it combines with an egg (which only can have X, since females are XX), it makes a boy XY or a girl XX