Embryos Receive Parent-Specific Layers of Information

Following up on last week's article about offspring and mothers' previous sexual partners (in insects, anyway), new research now sheds some additional light on the multi-layered process of how a sperm and egg pass along information needed for successful reproduction.

As described in an article published in the journal PLOS Genetics:

Though one layer is the DNA code that is transferred, the new study identifies information not encoded by DNA, a so-called "epigenetic" layer of information that helps the cell interpret the genetic code.

In insects this additional "epigenetic" layer of information apparently can come from a previous mate. The question if such or similar mechanisms can also exist in higher organisms, e.g. also in humans, might be far fetched, but not that far, that it precludes a more thorough research. Clearly, there are still plenty of unknown factors in human and non-human reproduction: an area ripe for further research.