Okay I don't know whether this question has been asked before...I am genuinely sorry if it has..
Ok so a pregnancy is formed when a sperm meets the egg....and if the egg is fertilized a feotus is formed...But what is it that determines the sex of the feotus? The sperm meeting the egg?
Posts: 104 | From: India | Registered: Mar 2006
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Sperm cells have two different sets of chromosomes; xx, and xy. All ovums have the chromosome pair xx. Think "y" as in "guy".
Whichever sperm cell meets with the ovum first carries over its set of chromosomes. If it's an xx sperm, development will continue uninterrupted, and the fetus will remain female. If the sperm is xy, the fetus will begin to develop male sex characteristics at the appropriate developmental time.
[ 04-02-2007, 12:44 PM: Message edited by: Miss Lauren ]
Posts: 4636 | From: USA/Northern Europe | Registered: Oct 2005
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