cis configuration(redirected from Cis-trans isomerism)
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2. the property of two or more sites on the same molecule of DNA.
1 the presence of the dominant alleles of two or more pairs of genes on one chromosome and the recessive alleles on the homologous chromosome.
2 the presence of the mutant genes of a pair of pseudoalleles on one chromosome and the wild-type genes on the homologous chromosome. Compare coupling, trans configuration.