deleterious alleles

Can Neutral Alleles Evolve Through Selection?

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Can Neutral Alleles Evolve Through Selection? History. The neutral theory of molecular evolution contends that at the molecular level, most evolutionary changes and polymorphisms within species are not caused by natural selection, but by random genetic drift. How does neutral mutation affect evolution? Neutral mutation and the neutral theory of molecular evolution are not separate

Why Are Recessive Traits More Common?

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Why Are Recessive Traits More Common? It is possible for recessive traits to be the most common (think blue eyes in Sweden) or dominant traits to be rare (think dimples everywhere). What makes a trait recessive has to do with the particular DNA difference that leads to that trait. How are deleterious alleles maintained? They