Why do the epigenetic changes last only a few generations? Hmmm. Well, if life, in general, exists by design and not by chance, many adaptations may only be intended to last a few generations. Environments constantly change, after all, and a requirement that all patterns be locked in could be a road to extinction.
Epigenetics is harder to study in humans because human development takes a long time and researchers are not allowed to do the things to humans that they can do to animals. The amount of information about epigenetic changes inherited by humans is likely to grow over time though.
Not from Darwinism? A technique to reveal cells’ epigenetic features is detailed
If the Weismann barrier is broken, that’s barbarians at the gates of textbook Darwinism, no? It turns out, all sorts of sources can contribute to inheritance.
Release: “Until just a decade ago, the idea of epigenetic inheritance would have made Greer an object of scientific ridicule. … The prevailing evolutionary dogma has been natural selection, as put forth by Darwin…
The main thing we’re learning these days is that epigenetics is much more important than we used to think. Which means that purely Darwinian evolution must be much less so.
The memory only lasted about five generations but the fact that it happens at all is significant. … It might help in understanding why many families seem to replay “addiction tapes” into the third and fourth generation.
Talbott: Not that the gene sequences are themselves mutated in the usual sense. Rather, the researchers found that various epigenetic modifications in the hippocampus alter the way the genes work (Weaver et al. 2004).
If this trait turns out to be widespread, it may help explain some puzzling aspects of animal behavior: specifically, how animals that are definitely not able to learn much individually appear to know things.
If we accumulate precise information as to the method of epigenetic transmission, we will have the material for a serious theory of epigenetics in evolution. That is how Darwinism fades. Not by knowing less about evolution but by knowing more.
It had to happen: Someone making epigenetics stand in for the selfish gene, an all-purpose gene-splain: If epigenetic research utilizing these new technologies will successfully shed some light in disease prevention, diagnosis, and therapy, then the research can expand to study epigenetics related to human behavior and moods. Aggression, violence, adultery, sexual preferences, risk-taking, happiness, […]
From ScienceDaily: For many years, it was thought that sperm do not retain any histone packaging and therefore could not transmit histone-based epigenetic information to offspring. Recent studies, however, have shown that about 10 percent of histone packaging is retained in both human and mouse sperm. “Furthermore, where the chromosomes retain histone packaging of DNA […]
In a study of mice forced to inhale large doses of nicotine carried large epigenetics signatures that affected their offspring: The result might explain why the experiments also found the male mice’s offspring—and grandoffspring—exhibited abnormal behavior and learning impairments. “Until now, much attention had been focused on the effects of maternal nicotine exposure on their […]
Remember old-fashioned, unalterable DNA? It was interesting stuff. So now this: “A study of chemical tags on histone proteins hints at how the same genome can yield very different animals:” The bee genome has a superpower. Not only can the exact same DNA sequence yield three types of insect—worker, drone, and queen—that look and behave very […]
From ScienceDaily: Two broad findings have been seen in memory reconsolidation, which is the retrieval and strengthening of a recent memory. The first broad finding is that, during memory reconsolidation, changes in translational control — the process of forming new proteins from activated genes — occur in areas of the brain related to memory formation. […]