A classic study with rats showed that behavior can influence the epigenome. Whether mother rats licked and groomed their offspring or not, altered epigenetic marks on the (GR) or glucocorticoid receptor gene, impacting stress responses in the offspring. In offspring which experienced no licking or grooming:
Question 3Answer
a.
The DNA was methylated, activating transcription
b.
The DNA was hypo-methylated, repressing transcription
c.
The DNA was methylated, repressing transcription
d.
The DNA was hypo-methylated, activating transcription
e.
The DNA was mutated disrupting gene expression