Crossword Genius

Molecule in chromosomes (3)

Ross

I believe the answer is:

dna

(Other definitions for dna that I've seen before include "Initially, it stores genetic information" , "Double-helix molecule (abbr.)" , "Bodily substance that stores genetic information - police use it to identify" , "Substance that stores genetic information in body" , "Substance that stores genetic information - often used by police" .)

I've seen this clue in the USA Today.
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