Crossword Genius

Gene variant (6)

Ross

I believe the answer is:

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gene variant</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Another definition for allele that I've seen is " One of alternative copies of gene".)

I've seen this clue in The New York Times, the LA Times and the Universal.
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