Biology

24 July, 14:12

Which statement about Down syndrome is true? A. Trisomy of chromosome 21 is well tolerated enough to give rise to fully‑developed individuals. B. The probability of a child having Down syndrome does not correlate with maternal age. C. The primary cause for Down syndrome is the Robertsonian translocation. D. Down syndrome never runs in the family, as it is based on a random aneuploidy event.

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