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Determining male or female

  1. Jul 4, 2010 #1
    I am a science fiction writer and got to thinking about how we determine if a being is male or female. Of course, I understand our biology of eggs and sperm, but just what makes a cell either an egg or sperm?
  2. jcsd
  3. Jul 4, 2010 #2


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  4. Jul 4, 2010 #3
    thanks so much. That's exactly what I was looking for.
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