Researchers studying mice have found that in utero exposure to certain chemicals can cause genetically identical twins to have different colored fur.This is best explained by the fact that genetically linked traits can be modified by
A) serotonin molecules.
B) epigenetic marks.
C) a reactive temperament.
D) chromosomes.

Question

Quizplus · Accepted Answer

Epigenetic marks, such as DNA methylation and histone modifications, can influence gene expression and therefore modify genetically linked traits, leading to differences in fur color between genetically identical twins.

Researchers Studying Mice Have Found That in Utero Exposure to Certain