Epigenetics studies which of the following?

Epigenetics studies which of the following?

• A. Changes in DNA sequence
• B. Inheritance of physical traits only
• C. The influence of the environment on gene expression
• D. Random genetic mutations

Answer: (C)

Epigenetics examines how environment and experience can regulate gene activity without changing the DNA sequence. Through chemical modifications, such as methylation of DNA or alterations to histone proteins, the instructions in genes can be made more or less accessible to the cellular machinery that transcribes them. This means the same genetic code can yield different outcomes depending on factors like nutrition, stress, toxins, or developmental signals. While the DNA sequence stays the same, these regulatory changes can influence traits and, in some cases, be passed to future generations. That focus on environment-driven control of gene expression is what the option describes most accurately.

Epigenetics examines how environment and experience can regulate gene activity without changing the DNA sequence. Through chemical modifications, such as methylation of DNA or alterations to histone proteins, the instructions in genes can be made more or less accessible to the cellular machinery that transcribes them. This means the same genetic code can yield different outcomes depending on factors like nutrition, stress, toxins, or developmental signals. While the DNA sequence stays the same, these regulatory changes can influence traits and, in some cases, be passed to future generations. That focus on environment-driven control of gene expression is what the option describes most accurately.