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Different mutations referable to the same locus of a chromosome give rise to

1. multiple alleles
2. pseudogenes
3. polygenes
4. oncogenes

Correct answer: multiple alleles

Solution

Different mutations occurring at the same locus produce alternative forms of the same gene, which are called multiple alleles. The other options describe different genetic concepts: pseudogenes are nonfunctional copies, polygenes are many genes affecting one trait, and oncogenes are cancer-related genes.

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