Suppose that one allele for an enzyme codes for a form that is active from pH 6.2 to pH 6.8 and another allele for this enzyme codes for a form that is active from pH 6.7 to 7.2. Heterozygous individuals show enzyme activity from pH 6.2 to 7.2. Why does this wider range of activity show overdominance

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This range shows overdominance because heterozygous individuals make a mixture of two proteins with different optimums. Overdominance is a genetic phenomenon.

Overdominance and genetics

Overdominance is a phenomenon that occurs when the phenotype of a heterozygous individual is found outside the range of homo-zygous individuals.

This phenomenon (overdominance) is relatively common in genetics.

Overdominance confers an adaptive advantage to heterozygous individuals.

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