I was quite happy to see that you draw the DNA right-handed, but immediately after I was sad to see the DNA wrapping around the histone octamer in a right-handed fashion. That is wrong at lest for Eukaryotes where DNA wrapping is left-handed. This aspect is of fundamental importance for DNA supercoiling.
@stickinup2188 No it isn't. Evolution happens when things mutate and don't get copied right. If this mutation or change in the DNA is beneficiary, chances are that organism will have a better chance for survival over those without the beneficiary mutation. Over time, the descendants of the original mutant have the mutation as well and reproduce more and the mutation becomes more widely spread throughout that species and changes the species as a whole. Hence, the species is evolved.
Epigenetics is changing the way we look at the world. My mind is sprouting with ideas extending from this... for one -- knowing this - now the nucleus is so much more like a brain. I mean if the dna can be flagged that would act as a mechanism of memory. Suddenly now the cell will perceive the world differently based upon its experience.
i dont think so
ijThomasine268 2 months ago
good
AzNoelle493 2 months ago
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A good documentary on genes is: The Ghost in our Genes. You can watch it online for free.
LOGICandREAS0N 3 months ago
I was quite happy to see that you draw the DNA right-handed, but immediately after I was sad to see the DNA wrapping around the histone octamer in a right-handed fashion. That is wrong at lest for Eukaryotes where DNA wrapping is left-handed. This aspect is of fundamental importance for DNA supercoiling.
claudiorivetti 11 months ago
Well I believe DNA is NOT fixed for life; this is how evolution happens.
stickinup2188 1 year ago
@stickinup2188 No it isn't. Evolution happens when things mutate and don't get copied right. If this mutation or change in the DNA is beneficiary, chances are that organism will have a better chance for survival over those without the beneficiary mutation. Over time, the descendants of the original mutant have the mutation as well and reproduce more and the mutation becomes more widely spread throughout that species and changes the species as a whole. Hence, the species is evolved.
8888plasma 11 months ago
Epigenetics is changing the way we look at the world. My mind is sprouting with ideas extending from this... for one -- knowing this - now the nucleus is so much more like a brain. I mean if the dna can be flagged that would act as a mechanism of memory. Suddenly now the cell will perceive the world differently based upon its experience.
gotxp 1 year ago
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naneedj.info I love sports and spending time
taniya3957 1 year ago
really great little lesson.
katievhoneychurch 1 year ago
Thanks for posting this. I'm trying to teach myself about epigenetics and these video's really help : )
oneworldfamily 2 years ago 2