For flies at least, a sexual fling in their youth can come back to haunt them, even if theyâve found a new mate.
It turns out, ex-lovers have a lasting impact in the world of nerelid flies: A female flyâs offspring can physically resemble a previous mate that is not their genetic father. Scientists believe this represents a new form of non-genetic inheritance.
Scientists knew that the nutrition larval male nerelids receive impacts the size of their own offspring later. So the