[cantrevealname]

> cats have an inborn instinct to murder small critters for fun, and don't need to be taught that

If a cat has never seen mice before and no one has taught it to chase mice (and if it's not even hungry), then I simply can't imagine how this instinct is passed on through genetics. Is there a DNA encoding for "chase and kill small moving objects, preferably mouse-like objects"? Does anyone know how DNA would carry information like that?

[svachalek]

Not a biologist, but it looks like it's an urge toward certain behaviors that just get reinforced. A mouse tail running away from them is very exciting and they want to chase it. But a piece of string can trigger the same thing. They run towards it, they jump on it, they bite it, if they're hungry they might eat it and eventually the whole thing becomes a trained behavior in wild cats. A well fed domestic cat might get stuck on "let's be play friends forever" though.

[vinhcognito]

I've always had trouble with reconciling the jump from DNA to behaviours. These behaviours can be affected by a complex combination of genetics and epigenetic modifications leading to changes like modified neuronal patterning in the brain or changes in neural circuitry that can affect how readily certain neural patterns are forged which is further influenced by biological factors (learned behaviours and experiences).

[adversaryIdiot]

yes thats what instincts are. theyre urges that you cant explain