famous people in A B C order! :)
- Thread starter thriftyEvie
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- Mar 23, 2004
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- Mar 23, 2004
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Stevens, Nettie -1861-1912
Nettie Stevens discovered that an organism’s sex is determined by its chromosomes – now known as the XY sex-determination system: females have two of the same kind of sex chromosome (XX); males have two different sex chromosomes (XY).
Nettie Stevens discovered that an organism’s sex is determined by its chromosomes – now known as the XY sex-determination system: females have two of the same kind of sex chromosome (XX); males have two different sex chromosomes (XY).
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