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  • 11-03-2017
  • Biology
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What type of error in meiosis causes Down syndrome

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Аноним Аноним
  • 11-03-2017
when one parent either egg or sperm has a copy of the 23rd chromosome
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Аноним Аноним
  • 11-03-2017
Three types of chromosome 21.It can result from the translocation of a large segment of a third chromosome 21 into another chromosome. 

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