Wild. So the experiences of your grandparents has some direct effects on you!1
Sounds like a plot point from Frank Herbert’s Dune series…
Experiments showed that a traumatic event could affect the DNA in sperm and alter the brains and behaviour of subsequent generations.
A Nature Neuroscience study shows mice trained to avoid a smell passed their aversion on to their “grandchildren”.
Experts said the results were important for phobia and anxiety research.
The animals were trained to fear a smell similar to cherry blossom.
The team at the Emory University School of Medicine, in the US, then looked at what was happening inside the sperm.
They showed a section of DNA responsible for sensitivity to the cherry blossom scent was made more active in the mice’s sperm.
Both the mice’s offspring, and their offspring, were “extremely sensitive” to cherry blossom and would avoid the scent, despite never having experienced it in their lives.
Changes in brain structure were also found.
“The experiences of a parent, even before conceiving, markedly influence both structure and function in the nervous system of subsequent generations,” the report concluded.
Family affair The findings provide evidence of “transgenerational epigenetic inheritance” – that the environment can affect an individual’s genetics, which can in turn be passed on.
(click here to continue reading BBC News – ‘Memories’ pass between generations.)Footnotes:
- possibly [↩]