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1 Roughly one in every 1 000 girls is born with three copies of the...

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1 Roughly one in every 1 000 girls is born with three copies of the X chromosome Although the extra X chromosomes are inactivated in somatic cells triple X females often exhibit lower IQ motor coordination problems and delayed language development Imagine a triple X girl Abeya who shows an X linked recessive trait called ocular albinism lack of pigmentation in the eye That is Abeya carries the mutant allele on all three of her X chromosomes Abeya s father and brother also exhibit ocular albinism but her mother does not A B C D E In which of the following stages of meiosis might the error have occurred Assume no crossing over and that the XXX karyotype resulted from a single error in chromosome partitioning 1 Meiosis II in the father 2 Meiosis I in the mother 3 Meiosis II in the mother 4 Meiosis I in the father 1 2 3 only 1 3 only 2 4 only 4 only All of 1 2 3 4 are correct

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