Submitted by AutoModerator t3_ywvph3 in askscience
noiamholmstar t1_iwqb1fb wrote
Reply to comment by chazwomaq in Ask Anything Wednesday - Engineering, Mathematics, Computer Science by AutoModerator
Technically, epigenetic inheritance is a thing, so they weren't entirely wrong.
atomfullerene t1_iwqmid5 wrote
Epigenetics isn't really the inheritance of acquired characteristics, though. It's more the ability to alter what traits your offspring express in response to your environment. There's no requirement that those traits be the same as the ones you have. For example, you could imagine a situation where high food availability causes parents to lay down epigenetic markers that cause their offspring to also have a high tendency to gain weight. Or you could imagine a situation where high food availability causes parents to lay down epigenetic markers that cause their offspring to avoid gaining weight. Or a situation where high food availability cause parents to lay down epigenetic markers to suppress melanin production and produce lighter fur (although I have no idea why such a system would ever evolve). The point is, there's no necessary connection between the parent trait and the offspring trait. There can be a similarity, but there doesn't have to be. It just depends on what sort of adaptations the organism has.
chazwomaq t1_iwqq18i wrote
Lysenkoism and Lamarckism are not the same as epigenetic inheritance and are entirely wrong.
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