this post was submitted on 11 Nov 2024
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[–] [email protected] 22 points 2 days ago (1 children)

Tough luck, this might affect his grandkid, not the kid. Epigenetic imprinting (the semi-permanent kind) is done during oogenesis, which if I am right occurs during pregnancy.

[–] UnderpantsWeevil 33 points 2 days ago* (last edited 2 days ago) (1 children)

It's also not necessarily a net-gain. There are a bunch of trade-offs to being better able to deal with a lack of food. Specifically, by sacrificing body mass and brain development to conserve energy.

Surviving adverse conditions can mean developing novel evolutionary strategies. But it can also just amount to evolutionary downsizing. Living as a smaller, weaker, stunted version of your predecessors because the runt of the litter needs fewer calories to get by.

[–] [email protected] 5 points 1 day ago (1 children)

Yeah I was about to say. Aren't children from families that suffered famines much more likely to have (and have children that have) digestive problems and food related deficensies?

[–] UnderpantsWeevil 2 points 1 day ago

And heart and respiratory and neurological, etc etc

[–] [email protected] 12 points 1 day ago (1 children)

What’s the plan with the raptor? Increase the kid’s running speed? Anxiety? Fear of birds? Love for Spielberg movies?

[–] AngryCommieKender 7 points 1 day ago

The ability to perfectly deliver the line, "clever girl."

[–] [email protected] 9 points 1 day ago* (last edited 1 day ago)

"Epigenetics shows..." cries in evolutionary biology having demonstrated inter-generational plasticity for more than 30 years, totally ignored by molecular geneticists who discovered after everybody else that everything is not about DNA

[–] Limonene 12 points 2 days ago (2 children)

Epigenetics is black magic to me. The starvation thing is true, but it mostly happens in the liver and pancreas and stuff. The testicles and ovaries don't express the genes relating to starvation, even when starved. So how does the reproductive DNA pass on epigenetic data to the child and grandchild?

[–] [email protected] 1 points 2 days ago* (last edited 2 days ago)

Although the immediate processing of food might occur in major digestive organs, the effect of increased or decreased nutrient availability will be felt throughout the body. One primary effect of starvation is the breaking down of cells (autophagy) in order to reuse their components for more necessary bodily functions - like the atrophying of muscles.

Naturally, your germ line cells are one of your core bodily functions, so the nutrients will necessarily need to make their way there.

One recent paper[1] hypothesized that the byproducts of this cellular breakdown can cause cells to bundle up DNA that encodes some genes, rendering them less accessible and therefore less active. This can even be passed trans-generationally (presumably by altering the tight storage of specific genes in the germ line cells).

Broadly this mechanism is called epigenetics, where specific histone protein modifications cause regions of DNA to coil up tightly, making it far less likely to be expressed, or unwind and become far more active. It’s a very neat mechanism by which many characteristics can become generational despite not having a clear genetic component.

[1] https://pmc.ncbi.nlm.nih.gov/articles/PMC10244352/

[–] [email protected] 3 points 1 day ago

In 2011 I heard about/read a study/article that detailed the listed example.

Tldr dieting while pregnant will make your baby more likely to be overweight. Don't do that.

[–] [email protected] 8 points 2 days ago (1 children)
[–] [email protected] 3 points 1 day ago

If they starve as young

[–] DarkCloud 2 points 1 day ago (1 children)
[–] Agent641 1 points 1 day ago

Nothing wrong with that

[–] [email protected] 4 points 2 days ago

Plan for the future

[–] ArdMacha 1 points 1 day ago* (last edited 1 day ago)

Epigenetics is part of how DNA works though, it isn't separate