The most preferred diagnostic procedure for detecting T21 (Down syndrome), T13 (Patau syndrome) and T18 (Edwards syndrome) includes karyotyping that refers to:
a. a range of DNA and structural chromosomal abnormalities.
b. a range of aneuploidy and structural chromosomal abnormalities.
c. a range of numerical and structural chromosomal abnormalities.
d. a range of numerical and DNA chromosomal abnormalities.
ANS: C
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