patypatyok patypatyok

26-05-2017
Physics

contestada

what cause down syndrome

Respuesta :

26-05-2017

Missing Chromosomes! xD

Weird Question!

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lindseyspearman lindseyspearman

26-05-2017

It is caused by an additional genetic material from chromosome 21. Implying, that person would have three number 21 chromosomes. (In most cases)

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