The similarity of DNA sequence between twins would usually carry the expectation that they would be similar in virtually all physical aspects. However, this is not the case for many. This is because of their differences in gene expression. Note that genetic expression is still differently regulated even between genetically identical individuals.
Monozygotic twins have identical DNA sequences, yet twins can differ in some physical orbehavioral traits.
What evidence suggests that epigenetic effects may cause these penotypic differences in monozygotic twins?
A. Younger twins have more similar DNA methylation and histone acetylation patterns than older twins.
B. Older twins increase DNA methylation, whereas younger twins increase histone acetylation.
C. Younger twins increase DNA methylation, whereas older twins increase histone acetylation.
D. Older twins have more similar DNA methylation and histoe acetylation patterns than younger twins.
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