Genomic Imprinting

Genomic imprinting

A) can be triggered by smoking or exposure to environmental pollutants, such as mercury or lead.
B) occurs when alleles are chemically marked in such a way that one pair member is activated, regardless of its makeup.
C) is more likely to affect males because their sex chromosomes do not match.
D) is always permanent, cannot be erased in the next generation, and occurs in all offspring if it occurs in one.