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If the sperm contains a Y chromosome the baby will be a boy, if it contains an X the Y chromosome swim faster than the X ones, but they do not live as long.

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30 Sep 2015 area's smoothest MCs in a genre that has more Y chromosomes than most. they also all live in the same apartment building in Burlington.

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Join Date: Dec 2010; Location: Eastern Washington State, USA; Posts: 63,050: Post Thanks / Like present in Y sperm along with the slightly smaller Y chromosome). 3) X sperm are strong and live a long time and Y sperm are weak . X and Y sperm was fount to be inaccurate (VanKooij and VanOost 

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10 Sep 2014 Y chromosome Substitution rate Demographic history Lineage dating kind of mutation rate to be used in Y chromosome dating is controversial, . an African American individual and the Mbo population living in Cameroon.

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