In this video we recap chromosomes and then explain what DNA is, what genes and the genome are, and how we can use them to track the migrations of early humans.
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Have my GCEs in a month and there's nothing worse than starting on past papers and realizing you know nothing so I'm immensely grateful for this video. Gonna come back with an A* hopefully all because of you TYSM 😭
every time I have these massive panics about my science term papers ur videos just appear like a savior. I actually understood smth thank you so much. I'll be back with an A+ for bio
Thank you for explaining that most chromosome drawings are confusing as they show a cell undergoing mitosis and not in its normal state. Why do they do this, I have spent hours going around in circles as each chromosome seemed to contain 4 DNA strands when they don't normally.
thank you for this video, i can now understand topic 6 now, i just now need to go over all of it now. But could i ask a question? So lets say my hand for example, made up of a bunch of skin cells, which all have a nucleus and DNA for protein synthesis. So one skin cell in my body is programmed to create specific chain of amino acids to make a protein, now will my all my skin cells on my hand produce different chains of amino acids or would they all produce the same exact chain of amino acids? or will they produce different amino acids every different cell?
Thanks Adham! Basically, all of your skin cells will produce a similar set of proteins. So there will be some proteins that all of them make (by coding for the exact same sequence of amino acids), and other proteins that only some of them make, depending on what type of skin cell they are (you don't need to know about the different types). When they produce the same protein they will use the same amino acid sequence to do it. Hope that helps :)
3:08 Question: are red blood cells red blood cells because they produce the protein hemoglobin? Or do red blood cells produce hemoglobin? Any help appreciated!🙏
hi love the video. I still have a question though. Its kind of stupid I guess but I would be really grateful if you could help. Is chromosome part of a DNA or does DNA make up a chromosome? What I understood from the video is that DNA is divided into 46 sections called chromosomes but on google it says 'each chromosome is made up of dna'.
Hey, I'm not cognito nor a teacher but oh well...Chromosomes are made of DNA and all the genetic information of one's body is distributed among these chromosomes
Oooh at 2:11 it makes so much more sense . Thank u this is very helpful. I had a question , so I understand the part where the gene codes for a specific amino acid sequence to make a protein , which determines what the cell type is , but how do genes and dna determine inherited characteristics like eye colour , and like how does it work ? So suppose a muscle cell in the leg , will it have a gene to code for eye colour?
It'll be random and depends on the alleles you inherit from your parents. You can find out the likelihood of inheriting a particular characteristic using a Punnett square.
And the muscle cell wouldn't have Gene's to control the eye, all our inherited characteristics would already have been determined whilst we were developing in the womb. I wasn't too sure on how to answer your question so sorry if it doesn't make too much sense.
INTERESTING LESSON.CHROMOSOMES ARE ALSO A PART OF DNA,WHICH IS LONG LIKE A THRAD.GENES ARE THE ONES WHICH GIVES OUR FEATURES.THE CHARACTERISTICS THAT WE INHERIT FROM OUR PARENTS ARE FEATURED BY OUR GENES.YOUR HAIR COLOUR,RACE,EYE COLOUR AND GENETIC DISEASES ARE INHERITED FROM YOUR PARENTS THRUOGH THE GENES.DNA CONTAINS MANY PROTEINS.
When you explained genomes in your concluding part, you mentioned: "...when humans left Africa". Can you please elaborate on that and how it relates to the topic. Thank you.
Its refering to the human genome project you need to know three things: •one of those things is that human migrated from Africa thousands of years ago and that can be shown through DNA (so we can track the migration of our ansestors and understand them better through there movement but i think the explaination to why is beyond GCSE so wouldnt concern us much unless we're interested but he does explain this in the video) •different diseases caused by genes (inhertited disorders like polydactyly or cystic fiberosis) •and how we can treat these inherited disorder
@@aoy1889 the sex’s r male and female ( plus intersex tho that’s quite rare ), but genders r what ur talking abt like being trans or non-binary. It’s just the word gender became synonymous with the word sex even though the two mean different things. Gender meaning how we express ourselves and sex meaning our biological parts ect
@@aoy1889 both a gender and a sex, you can have the biological sex of a women while still not identifying as one, or you can be a biological male and still identify as a women. Plain and simple a women is anyone who identifies as a women.
I am not sure if anyone notified you, however, at 5:26 you spelt the noun “strangire” incorrect. It is actually spelt strangire. Please don’t make this mistake again and delete the video.