Frank and Bill are identical twins. At age 3, their genetic assays are identical. However, at age 50 there are major changes between the assays. What is the approach that examines differences in how genes are expressed?

Question

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Epigenetics examines how genes are expressed through modifications that occur to DNA without changing the actual sequence. This can explain why even though Frank and Bill have identical DNA at age 3, their genes may be expressed differently at age 50. Twin studies examine the similarities and differences between twins, association studies look for relationships between genes and traits, and linkage analysis identifies the location of specific genes on chromosomes.

Frank and Bill Are Identical Twins