Which of the following is the most common finding in chromosomal analysis of Down syndrome?
A) Trisomy 21 with the extra copy being maternal in origin
B) Trisomy 21 with the extra copy being paternal in origin
C) Robertsonian translocation involving chromosome 21
D) Mosaicism for trisomy 21
E) A and B are equally likely
Correct Answer:
Verified
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