单词 | variegated position effect |
释义 | variegated position effect [`ver·ē·ǝ´gād·ǝd pǝ¦zish·ǝn i´fekt] GENETICS A phenomenon observed in some cases when a chromosome aberration causes a wild-type gene from the euchromatin to be relocated adjacent to heterochromatin; the phenotypic expression of the wild- type allele will be unstable, producing patches of phenotypically mutant tissue that differ from the surrounding wild-type tissue. |
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