Heterozygotes for the sickle-cell allele show higher fitness than either homozygote genotype in malarial regions. This is an example of

Name: Heterozygotes for the sickle-cell allele show higher fitness than either homozygote genotype in malarial regions. This is an example of
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Heterosis, also known as heterozygote advantage, occurs when heterozygous individuals have a higher fitness than either of the homozygous genotypes, as seen with the sickle-cell allele in malarial regions.

Heterozygotes for the Sickle-Cell Allele Show Higher Fitness Than Either