thereby providing concrete evidence for what became known as the chromosome theory of heredity. Early Breakthroughs: Mendel and Darwin Propose Mechanisms of Heredity The year 1865 was marked by ...

In addition, epigenetics is important for X-chromosome inactivation in female ... can reactivate genes that have been silenced. Two examples of these types of drugs are 5-azacytidine and 5-aza ...

Such examples suggest that even if the Y chromosome disappears—which may take millions of years—human biology could evolve ...