Are all genetic traits correlated with reproductive success?
Simple answer: No. Although the term “genetic trait” is somewhat ambiguous, nevertheless an affirmative answer to this question would imply that there is no such thing as “neutral variation”, variation which does not matter for reproductive success. In general, although it is unwise to presume that variation in any particular trait has no significance for fitness, it is also unwise to presume the opposite. Return to question list.
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