I NEED HELP!!!!!
Even though the Punnett square calculates that a couple has a 50/50 chance of producing a male or female, there are slightly more females born in the human population. Why might this be?

Females produce more X chromosomes.
Sperm carrying the Y chromosome swim slower and often lose the race to the egg.
Girls are stronger in embryonic development.
All of the above are correct.

Question

I NEED HELP!!!!!
Even though the Punnett square calculates that a couple has a 50/50 chance of producing a male or female, there are slightly more females born in the human population. Why might this be?
 		
	Females produce more X chromosomes.
	Sperm carrying the Y chromosome swim slower and often lose the race to the egg.
	Girls are stronger in embryonic development.
	All of the above are correct.

anonymous · Answer

B. sounds like some bs, so its deff not D.
A is correct so I'd go with A. as your answer.

anonymous · Answer

A