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____ errors in the first meiotic division predominate among almost all trisomies. In addition, increasing maternal age, or more exactly, ____, is thought to be a significant risk factor for most, if not all, trisomies.

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1. ____ errors in the first meiotic division predominate among almost all trisomies. In addition, increasing maternal age, or more exactly, ____, is thought to be a significant risk factor for most, if not all, trisomies.





 
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