Infant rats deprived of their mothers' normal licking had more ________ that block access to the "on" switch for developing the brain's stress hormone receptors.

Question

Quizplus · Accepted Answer

Epigenetic molecules, such as methyl groups, can attach to DNA and modify the expression of certain genes without changing the underlying genetic code. In this case, the lack of maternal licking likely led to changes in the epigenetic marks on certain genes related to stress hormone receptors, making them less accessible and inhibiting their development.

Infant Rats Deprived of Their Mothers' Normal Licking Had More