If a pregnant woman is concerned about her unborn child having Down syndrome, she might ask her doctor about getting an amniocentesis (sampling of amniotic fluid) to confirm it. What would a positive test reveal?
A) more than 2 copies of chromosome 15
B) amyloid deposits in the brain
C) more than 2 copies of Chromosome 21
D) malformed or missing X chromosome
Correct Answer:
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