Any biologyfags here? What do we know about epigenetics?
Basically, whether a gene is present or not isn't as important as where when or if it's even expressed. Genes can essentially be turned in or off by other genes in very complicated cascades, by environmental factors, etc etc. We're even seeing evidence that current expression of genes can be passed to offspring.
>whether a gene is present or not isn't as important as
>isn't as important
At best, it is equally important. At worst, it is unimportant.
No no way is epigenetics more important than the genes it, necessarily, must affect.
the secret is the term epigentics is very open ended and can be extended to describe anything environment wise
So malnutrition can be described as "epigenetics" then people say epigenetics is more important than genes. The trick of epigenetics is understanding the social programming it is used as in popular culture. AKA Genes don't matter, it's just epigenetics.
My azn molecular biology teacher, in order to stress to us the importance of epigenetics, told us a long story of how Stalin (being advised by Lysenko) forced people living in a certain region of China to wear warm pants during the winter. After one generation, their offspring couldn't survive the cold without wearing the warm pants.
Google: Lysenkoism +China. It's some crazy shit.
>We're even seeing evidence that current expression of genes can be passed to offspring.
This is interesting because it points toward the pathway for evolution. It's also something I took into account when considering having offspring of my own.
>What do we know about epigenetics?
The majority of epigenetic switches simply turn on and off genes, those switches that determine splicing of gene products are also determined by your genes
The title is very misleading, your genes are still very much your destiny
I know very little about epigenetics but to my understanding isn't it like the whole giraffe idea?
I don't know it doesn't make sense to me honestly because how does that affect the sex cells? I mean sure you could have some tiny effect in your neck muscles but it doesn't seem to translate to the sperm/eggs .
>but to my understanding isn't it like the whole giraffe idea?
Lamarckism is not commonly accepted as we all know, and epigenetics is more about the activation of genes due to environmental factors, not such that the underlying nucleic material is altered, but expressed differently. From a broad perspective, it's really a gesture to how metabolic activity copes or takes advantage of certain stressors.
Not usually. Giraffes are a terrible example because their long necks force them into awkward, vulnerable positions to drink water.
Epigenetics is similar to lamarckism because things that happen during the parent's life effects the expression of genes in the child. It differs from lamarckism if you go any further than that. Someone survived a harsh famine and had a kid afterward? Expect the kid to have +1 famine resistance.
I would argue (lol, like I matter) that epigenetics is any hereditable characteristic not directly transcribed by nuclear DNA.
So, endosymbiosis would be a type of epigenetic trait.