Trying to find the right answer to this..

If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?

Trait B may have arisen earlier as it is present in more members of the population. It must have arisen earlier and has now spread to 60% of the population. Whereas trait A must be new as it has spread to only 10% of the population.

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If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?