molecular genetics epigenetics

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7 Terms

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Epigenetic

Effects can result from modifications of a nucleic acid after it has been synthesized or by the perpetuation of protein structures

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Prion

A proteinaceous infectious agent that behaves as an inherentable, although it contains no nucleic acid

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Heterochromatin propagates

Heterochromatin is nucleated specific sequence and the inactive structure propagates along the chromatin fiber

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Position effect variegation (PEV)

The result of inactivation of genes in the vicinity

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Heterochromatin propagates pt2

Genes within regions of heterochromatin are inactivated

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Telomeric silencing

Spreading effects occurs at the telomeres and at the silent cassettes in yeast mating type loci

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Gene expression

Two states of gene expression (on and off) affect phenotype based on variable positions