New study shows effects on offspring of epigenetic inheritance via sperm
(PHYSorg.com Biology)

As an organism grows and responds to its environment, genes in its cells are constantly turning on and off, with different patterns of gene expression in different cells. But can changes in gene expression be passed on from parents to their children and subsequent generations? Although indirect evidence for this phenomenon, called `transgenerational epigenetic inheritance,` is growing, it remains controversial because the mechanisms behind it are so mysterious.