Chromosome Structure and Organization
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- Опубліковано 7 чер 2024
- We've all seen pictures of chromosomes, and we know that they contain DNA. But how do we get from the double helix of DNA to the X-looking shape of a chromosome? Is it just DNA, or are there other things in there? How much DNA is in each chromosome? Chromosomal structure is incredibly complicated, but now that we've learned about DNA and proteins, as well as Mendelian genetics for a little context, we are finally ready to get a more sophisticated view of what's inside a chromosome.
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I really wish I found these videos months ago instead of 2 days before my genetics final lmao
How did it go lmao 3 years later
Uss.after 4 years🙂
lmao I'm watching this for my highschool finals 😭
I hear that. No idea if I’ll pass lol
i’m here half an hour before my exam lol
Easy to understand :) I like how you talk slowly and give your audience time to comprehend.
I love you Professor Dave! I can't express much how grateful I am for all your effort in making these comprehensive contents in different fields of Natural Science. I am currently taking my Grad studies and I am literally stuck with all the concepts we are learning in class for I don't have a strong grasp of the basic concepts in Biology, Biochem and Chemistry. With your videos, I'm slowly recovering and retaining all the information I have learned way back in my undergrad. Thank you so much. May the Almighty bless you more. (:
You're videos don't have the amount of views they are worth. I will recommend to my friends in the future. Keep up the good work, more views will come in time seeming your channel is still fairly new.
such a great video. many many thanks.
please keep uploading biology videos.
i've got nine more coming in this series!
Professor Dave is too smart. I love his videos. Thank you so much.
Chromosomes are nearly as information-dense as this lovely video. Thanks Professor Dave!
Thanks, sir, that was a great explanation and it helped me a lot to make my concepts better.
I'm really enjoying this. So simple and comprehensive 😊
Amazing work! Glad I found your channel
This video is amazing and easy to understand
You're going to be the reason I pass my genetics class.
Good Vid. Thanks
your explanation is excellante
Easy to understand, and informative ! Thanks
Well done prof.
Thanks very much Sir
Loved it Sir
Oh, thank you Dave! I finally get X-linked genetics now.
Professor 👨🏫 Dave you are the science 🧬 GURU
Well done
Thank you sir
Love your videos!
Thanks!
Thanks man you're the GOAT
Excellent
Thank u sir
awesome prof,,,now that we are herding to exams would you plz send me some past AS-level questions to reviase on????
Sir please upload vidioes of agri related sir
Thanks
Question: so the DNA genome is 3 billion base pairs? and those base pairs are divided up into the 46 chromosomes in each cell? Thanks in advance
pretty much! although i'm not sure if that number refers to the 23 unique genomes or the 23 with the sister chromatids to give the total 46, best to look it up
I have a question, like if the chromatin after condensation forms chromosomes then the chromosomes formed after are really independent?
God bless you and thank you
super
bro, I've a simple question about the centromere... How many do we have in a ruplicated chromosome??
adamın dibisin krall
I needs notes on presentations
So... Question. You say that DNA doesn't just float in the nucleus but coils up.
But chromosomes are only made for cell division? So when it's not dividing what's its structure?
I'm not sure what you're asking, because this clip explains it.
chromatin
So "gene" and "non-gene" portions of the DNA is decided by whether that section is able to produce a protein or not. Is it a correct statement?
Yes kind of, in the sense that genes are the portions that are expressed.
@@ProfessorDaveExplains some genes transcripts are not translated like those of tRNA and rRNA genes
I want you to have a Thai lecture.
Thank u So much sir
When the maternal & paternal DNA strands join, surely the sequence of genes is different in each, but the different A T C G acids need to join correctly (A+T, C+G), so is one of the strands 'dominant' & any non-matching acid in the other strand skipped until the correct matching acid is found?
👍👍
What’s the Locus
Is it possible to add Arabic subtitles to the videos?
love from india... Can you help indian jee students solve higher level jee advanced
Tried to talk to my teacher about this, she didn't want to comment and told me to google it.
Make a video on molecular basis of chromosome pairing
Is chromosome made up of two sisters chromatin ?? Or is one sister chromatin called as chromosome...plzz sir reply I am getting confused
@@mayonnaisepc3340 😬 I haven't got answer yet.
A homologous chromosome is made of two sister chromatids. The sister chromatids are 100% identical to each other. A homologous chromosome is a pair of chromosomes that are almost identical, 1 from ur dad and one from ur mom, but they have a tiny difference in them.
They call the sister chromatid of a homologous chromosome simply chromatid for some reason. chromaTIN is just the loose form of genetic material in a cell.
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Why sister chromatids are identical as u say and on the other hand u say that homologous are not identical?
sister chromatids are the product of replication so they must be identical, homologous chromosomes are just corresponding chromosomes but they come from your two parents so they are not precisely the same.
I really understand...thank u sir..
@@ProfessorDaveExplains , regarding homologous chromosomes you said they contain "same genes but different alleles". Could you elaborate, maybe with an example?
A gene corresponds with a particular trait, like the pea plant traits from Mendel's work. Two different alleles may code for two different versions of the same trait. Watch my tutorial on Mendelian genetics it will make sense.
@@ProfessorDaveExplains , so I get: a gene, for example, codes for a person's skin colour, and the two alleles of that gene may be coding brown and white colour, coming from his 2 parents. Many thanks.
I understand how a gene sequence translates to a protein formation. I am however not convinced how that translates to a particular trait, eye size, say. Second question: all the cells in my body contain identical DNA, i.e. each cell has identical set of genes, thus a cell present at my eye has the gene code for my hand length too, and vice versa? So how come the 'right' gene decodes at my eye cells and the right genes decode at my hand cells. May I get some clues regarding this please.
gak ngurus
Hey Dave, Drunvalo Melchizedek (the guy the spirit science channel takes all its ideas from) claims that native australians have one less chromosome pair than the rest of the human race. I can find absolutely nothing supporting this. Any idea where this idea might have come from? Apparently this idea has gotten around a lot- see Carl Jung, Tool, etc...
It came from his rectum.
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Love from india😍
And all of this based on 'complete chance'. Yeah right.
That is totally meaningless.
@@ProfessorDaveExplains Don't get me wrong, I enjoyed your video and it was not a critique. I just find it so perplexingly beatiful and complex, that I don't accept the notion this is a result of complete chance.
@@peterevans3310 Biology isn't "complete chance". Learn basic evolutionary biology.
@@ProfessorDaveExplains Well, beneficial mutations which are pure chance and with a very low probability at that, are a sine qua non for macro-evolution. I cannot accept that a proces whose fundamental contributor relies purely on chance has the potential to produce this kind of stunning complexity, harmony and beauty.
@@peterevans3310 Mutations are pure chance. Evolution is not. It's really not that hard to understand. Watch this whole biology series.
"comprehensive" is your favourite word
Besides providing structural support to the DNA to wrap around, does histone have any other function? I feel like they are the most useless protein in our body.
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Wrong chromosomes are a measurement of time, power and a currency
Um, well no, they are none of those things.
What is the prove of
chromosomes 😊
If Jesus while He lived in the world have 24 chromosomes, 23 chromosomes from His mom and 1 chromosome is for genital type. What is His blood type? Same His mom, His dad, or none both?
a human zygote with 24 chromosomes wouldn't survive and develop any further, it would absolutely result in a terminated pregnancy
You confuse students because you don't explain things
Explaining things is literally all I do.