For over a century, Mendel's laws have served as the grammar of heredity — clean, predictable, written into the sequence of life itself. Now, researchers at Johns Hopkins School of Medicine have found that the genome speaks in a second language: chemical modifications layered atop DNA that can be inherited, shaped by sex, and even rewritten from one generation to the next, in defiance of rules held sacred for 150 years. Published in Nature Genetics, the discovery emerges from mouse studies but reaches toward some of humanity's most persistent medical mysteries — infertility, unexplained herita
Scientists discover hidden genetic inheritance rules that defy Mendel's laws
The research has implications for understanding infertility, azoospermia, and other heritable conditions affecting human health.