Exactly, so extending this, the capacity to respond to these stress markers is in the DNA, but the specifics of how that will be expressed appears to be picked up environmentally and transmitted to offspring.
> but the specifics of how that will be expressed appears to be picked up environmentally and transmitted to offspring.
I mean I guess that is a possibility, but that would be incredibly generic wouldn't it? That a cell could somehow identify novel environmental factors and figure out what gene expressions to enhance/neutralize in the next generation to adapt to that novel environmental factor? Strains credulity.
In my limited understanding, the credible version of this story involves the transmission of quite crude information, like a response to famine.
Lots of animals starved, since there were animals, and the ability to tune the behavior on a time-scale of a few generations might have been valuable, so it might have evolved. The basics of our hormonal system have not changed much since very simple animals, I think.
I mean I guess that is a possibility, but that would be incredibly generic wouldn't it? That a cell could somehow identify novel environmental factors and figure out what gene expressions to enhance/neutralize in the next generation to adapt to that novel environmental factor? Strains credulity.