Question

What does epigenetic gene regulation rely on? Check all that apply.

a) Chemical modifications to DNA
b) Physical alterations to DNA
c) Environmental factors
d) Inherited mutations

Answer 1

Epigenetic gene regulation relies on chemical modifications to DNA, physical alterations to DNA, and environmental factors.

Step-by-step explanation:

Epigenetic gene regulation relies on chemical modifications to DNA, physical alterations to DNA, and environmental factors. Chemical modifications to DNA, such as DNA methylation, can alter gene expression by blocking access to the DNA or influencing the packaging state of the DNA. Physical alterations to DNA, such as the movement of histones, can open or close chromosomal regions. Environmental factors, such as stress or ultraviolet light exposure, can trigger epigenetic changes, leading to modifications in gene expression.