If a populations shows very little phenotypic variance for a trait,then that trait is probably controlled principally by the environment rather than genetics.

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If a population shows very little phenotypic variance for a trait, then it is more likely that the trait is controlled principally by genetics rather than the environment. This is because if the environment was the main factor, there would be more variation as different individuals are exposed to different conditions.

If a Populations Shows Very Little Phenotypic Variance for a Trait,then