July 2022—Although offspring share similar DNA, their physical and behavioral differences are multifactorial. One of those factors is epigenetics, the chemical and structural modifications of DNA by proteins and enzymes. Whereas the DNA sequence is relatively stable, epigenetic modifications are dynamic, as they are critical to controlling gene expression in response to cellular development and environment. Reproductive cells, or gametes, carry half the normal set of chromosomal DNA. Advances in molecular technologies demonstrate that this DNA is epigenetically modified to influence traits of future offspring, referred to as transgenerational epigenetic inheritance.