The Wikipedia page is very short: https://en.wikipedia.org/wiki/Genetic_memory_(psychology)
And it refers to a Lamarckian process? The linked article is a little bit woolly. Are there any known studies definitively showing that genetic memory is encoded in DNA? What can be encoded? How much?
In: Biology
DNA is more complicated than just the sequence of ACGT nucleotides. As far as I know, the entire complexity of it is not yet fully understood.
One thing we do know is that some genes can be turned on and off by chemically modifying a nucleotide, without changing the sequence. So you could have a methylated nucleotide instead of a regular one, and that carries extra information about whether the gene will be expressed.
There was one study where they bred a fear instinct into a second generation of lab rats (if I remember correctly) by scaring their parents with a specific stimulus and then breeding the scared rats.
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