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Name: Kenneth Johnson
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What makes genes dominant or recessive?

We could address your question in two ways. First, we could define what dominant and recessive mean, in genetic terms - but I think maybe you already know that. Second, we can ask why a given allele (version of a gene) is dominant, whereas another allele is recessive. The answer has to do with the biochemical behavior of the proteins that are the products of those particular genes - that is, the "dominant gene" protein has a stronger effect than does the "recessive gene" protein.

Steve J Triezenberg

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