Crossword Genius

Segment of DNA (4)

Ross

I believe the answer is:

gene

'segment of dna' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for gene that I've seen before include "Unit of heredity significance" , "Biological factor determining heredity" , "Part of chromosome" , "Hereditary DNA sequence" , "Hereditary determinant" .)

I've seen this clue in the Irish Times (Simplex) and The Irish Times.
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