Epigenetic changes affect gene expression. What part of the chromatin (or the chromosome) is affected by epigenetic changes? What is one example of an epigenetic change? What are some of the characteristics of epigenetic changes? How does an epigenetic change differ from a mutation?
Base-pair substitution mutations that result in silent mutations are often found to occur in the DNA base-pair that corresponds to the third nucleotide in a codon in the mRNA. What is the most likely explanation for this finding?