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Why do all the gametes formed in human f...

Why do all the gametes formed in human females have an X- chromosome?

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Human females have two similar sex chromosomes (XX).Hence,during meiosis at the time of gamete formation,one x-chromosome enters each gamere.Hence,all the gametes posses an x-chromosome.Therefore humna females are said to be homogametic.
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  1. Why do all the gametes formed in human females have an X- chromosome?

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