On mitochondrial DNA, mating and mussels
In humans and most other animals, offspring get all their mitochondrial DNA from their mothers. But in mussels and other related bivalves, fathers also give their offspring their mitochondrial DNA. In a recent paper in the journal Molecular & Cellular Proteomics, researchers propose a new model to explain this mechanism of mitochondrial DNA inheritance, which is called doubly uniparental inheritance, or DUI. The model also puts forward a possible explanation for sex determination in mussels, the mechanisms of which are not known.