Crossword Genius

Unit of heredity (4)

Ross

I believe the answer is:

gene

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unit of heredity</span>' is the definition.<br/ ><span class="explanation-format__explanation">(heredity means passing on genetic characteristics)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Other definitions for gene that I've seen before include "Something got from parent < for boy" , "The Selfish -- (Dawkins)" , "Biological factor determining heredity" , "DNA unit" , "Hereditary determinant" .)

I've seen this clue in The Independent, The Times, the Sydney Morning Herald, The Telegraph, The Mirror and the USA Today.
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