Which of the following is NOT an example of epigenetics?

Question

a
A mother mouse's diet can affect the methylation of a gene that controls coat color, resulting in more brown pups than yellow
b
A person with lots of stress growing up and a history of schizophrenia in the family develops schizophrenia
c
A father's diet before puberty can affect his sons' susceptibility to cardiovascular disease
d
A butterfly wing with multiple colors is the result of different genes being turned on in different places in the butterfly wing

Answer 1

The option that is NOT an example of epigenetics is:

b A person with lots of stress growing up and a history of schizophrenia in the family develops schizophrenia.

This example mainly describes the interplay of genetic predisposition and environmental factors (stress), but it does not specifically address the mechanisms of epigenetics, which involve changes in gene expression that do not alter the underlying DNA sequence, such as methylation patterns or histone modifications. The other options clearly describe instances where environmental factors influence gene expression changes, which is a hallmark of epigenetic mechanisms.