Genetic Shift and Drift
These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.
More free lessons at: www.khanacademy.org/video?v=Ub...
Пікірлер: 28
Well I came here to learn how to drift with a manual. Now I know how viruses drift, not dissapointed.
Antigenic shift occurs when there is recombination between the genomes of the two viruses, creating new genes. This video describes reassortment of genes, no recombination. While this would produce a novel virus, it wouldn't produce a novel antigen, and therefore would not produce a pandemic. However, if you included an example where the gene for H1 recombined with the gene for H5, this would create a new gene -- H6. This novel antigen would be problematic.
@medoosama1120
6 жыл бұрын
Seth Stake absolutely correct
@ShiruSama1
2 жыл бұрын
That's what I was thinking! The antigens are still the same aren't they. Thanks!
Genetic Drift is a major evolutionary concept that is altogether different than what is described here. Genetic drift is a mechanism by which a random bottleneck event limits the genetic content that proceeds to the next generation. For example, if a family of naked mole rats lives underground and the ground randomly collapses (maybe a helicopter lands there) killing them all, but two naked mole rats survive because they happen to be foraging elsewhere, the resulting population is limited to the genetic content of the two survivors. Genetic drift can affect any population of evolving organisms (bacteria, archaea, eukarya, viruses). In contrast, antigenic drift and shift are specific concepts related to viral evolution and immune response. This video is a great explanation of antigenic drift versus shift, but it does not describe genetic drift. The title is incorrect.
@okpolihenry983
Жыл бұрын
you said my mind , cos i was wondering , how on earth would this genetic drift
The title is incorrect. Genetic Drift refers to something completely different. This is ANTIGENIC Drift/Shift, which is correct in the video itself.
@Jim_96504
16 күн бұрын
Okie Dokie
Brilliant!!!
good job 👍👍👍
Thank you so much
Best Teacher
When will you upload your next video? I'm waiting haha
Thank you
Antigenic drift occurs in both influenza A and B whereas Antigenic shift occurs in Influenza A only
Nice
Newly discovered, RNA can have proofreading mechanisms similar to DNA.
@okpolihenry983
Жыл бұрын
yes it does
does this apply to MRSA?
@diwashrai
3 жыл бұрын
Dont think so..as Mrsa is a bacteria and not a virus.
Where my WGU D311 Night Owls at?
ما فهمت . بس عاشت ايدج 😂❤
Amazing 😘😘😘🌹🌹🌹
wrong graph. virus reproduction is exponentiell so the genetic drift should also show a exponentiel curve
invisible due to black background
she really just said pointmutation. cancel her
Please use better brighter and wider font/pen for writing ✍ Or use a white back ground instead. Yours is a strain for eyes 👀
Thank you so much