locust

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locust(pl. loci) The specific place on a chromosome where a gene is located. In diploids, loci pair during meiosis and unless there have been translocations, inversions, etc., the homologous chromosomes contain identical sets of loci in the same linear order. At each locus is one gene; if that gene can take several forms (alleles), only one of these will be present at a given locus.

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