DNA methylation prevents gene expression.  Methylation and de-methylation are stimulated by a variety of environmental factors.  Methylation patterns in DNA can be passed onto daughter cells including eggs and sperm.  An implication of these facts is that Group of answer choices A. methylation is rare B. fewer and fewer genes will be expressed each generation C. more genes will be expressed in offspring than in their parents D. old individuals will express fewer genes than young individuals E. environmental effects on individuals can have effects on their offspring

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