@@huh9290 lmao I can't even remember, this must be when I first learnt this stuff. Since then I've gone over this topic about 2 more times. It's actually not too difficult
The low quality of this video almost makes it appear (incorrectly) that chromatid duplicates into sister chromatids in prophase II. But if you watch closely you can see this happens (correctly) earlier in prophase I. Homolog pairs separate first in meiosis I, and sister chromatids separate second in meiosis II.
nice one :) do you have any idea how difficult it is to find a good video explaining meiosis, regardless of how brief? there might have been a few terms that were left out but whatever, those are asiders, i'm just happy this one is accurate. so many videos talk absolute kaka O.o thanks a bunch :)
QUESTION Is it the individual gametes (like female chromosome and male chromosome) that duplicates or is it the zygote (the combination of both the male and female chromosome) during interphase, just before meoisis occurs and all that pairing up?
wow, my class during 40 minutes and i don't understand my teacher when he explain that, but now i understand everything clear, i'm from panama and i'm 14 years old thanks for the video
good video but i dont understand what they mean by miternal and feternal chromosomes? also does meiosis create cells that have more genetic distinctity thanks to crossing over or am i wrong? i have a test friday :S
LOL @ the music at the end. It was the kind of music you'd expect in a Jane Austen movie when there's a random 'beautiful' english landscape view. Haha. But good vid, thanks.
i dont understand if u start of with a diploid and divide once you get a haploid then divid a gain dont you only get a quarter of the genetic information??
Below is a short description of what is seen in the video. It was sort of difficult to figure out cuz the video is way too fast. If you still don't understand there are many videos that describe this so much better :) But I hope this helps!
When you were concieved, your zygote (you as a diploid cell with 2 complete sets of chromosomes [23 + 23 = 46 chromosomes]) was made up of 1 of your father's gametes (sperm cell containing 23 chromosomes) and 1 of your mothers gametes. You therefore have enough genetic info to mature, half from Dad and half from Mum. Keep in mind that gametes do not have a full set of genetic info, only half (gametes are haploid).
Alya it goes on and never ends its going to keep happening and happening and it will never stop until you cant have a baby, kinda different but i will understand this anyhow
@RainfulPhenix i'm asking myself the same question. The only thing I can guess (and I'm probably wrong) is that in each of the parents there are chromosomes from both HIS parents (parents of the parent), and they are randomly mixed during meiosis, meaning that you could (for example) look more like your grandpa than your grandma (your mother's parents) even if their cromosomes were present in equal quantity in your mother's genome.
@Sistarovat meiosis seems to be trasitional from mitosis...instead of PMAT making exact copies but PMAT-PMAT making copies with half sets that can recombine. since mitosis came first, evolution or descent with modification explains thsi nicely
what makes them homologous is the fact that one is from the mother and another is from the father and both of them ''unlock'' the same characteristics. is the best i can explain
@AnarchyInTheUK1947 Yeah, that would probably be it. I went from thinking of that to thinking that the homologous pairs were simply labelled mother and father because they produce "daughter" cells.
Meiosis confuses me. It was the one thing I couldn't grasp in Biology. I thought it took place the ovaries/testicles to make eggs/sperm. How does the cell get one chromosome from each parent if it's occurring there? Also, does one chromosome contain both alleles for a gene or just one?
Hell of a lot better than the science textbook, i read the whole chapter at least 5 times, didnt understand it, then just watch this and get a better understanding in under 2 minutes.
I'm confused, the chromosomes divide twice? so 46 pairs >> 23 pairs >> 23 chromatids, then at fertilization, 23 chromatids + 23 chromatids = 23 pairs of chromosomes, so the dipload is not restored?! T^T please helppp
I think the number of organelles is increased during the interphase, then they are um kinda equally 'distributed' lol inside the cell, before cytokinesis but I could be wrong.
Profase I (Consists of 5 stages: Leptotene 0:5, Zygotene0:12, Pachytene at 0:27 (when crossing over occurs and the chiasma is formed), Diplotene 0:50 and Diakinesis 0:56 (nucleolus disappear). then Metaphase I at 0:58, Anaphase I at 1:02. Citokinesis (division of the cell) begins at 1:5 - 1:10 Then there is a second division that starts with Profase II that ends when the chromosomes migrate to the ecuator of the cell at 1:26, see "Continuation"below
Continuation>> very fast Metaphase II at 1:27 (Chromosomes are aligned in the ecuator but centromeres have not yet divided), Anaphase starts when the centromeres divide aprox. 1:28 and end when they have reached the poles at 1:33 then at 1:33 starts Telophase II when they uncoil, lengthen and stain less deeply, chromatin is formed, and the nuclear membrane and nucleolus reappear.
@@huh9290 I got a D in Biology all those years ago! Did you realise how long ago that comment was?.. I did slightly better in my other two subjects thankfully (and I do mean slightly)
I did know part of that.In class we were discussing different genetic syndromes. I asked our professor if there was any evidence to show that a mutation (point mutation or at meiosis) resulted in usable increase of information. The professor answered "No, but that is what we are working on right now".So, I assumed that there wasn't any "proven" evidence.Somatic hypermutation affects only individual immune cells, and the mutations are not transmitted to offspring. Got a web page I can check out?
There are DNA, ribosomes, mitochondrias, and amino acids, and others inside the cell. In the meiosis division process, each of the organelles have their own consciousness. And all of them work simultaneously. So we can say these organelles are very clever? Who is actually managing this collaborative team work? There must be technical director behind it.
At the start there were a bunch of x shaped objects around, one red one blue. Each x object was made up of two strings called chromatids, and each chromatid of the same color is genetically identical. The chromosome of the other color is the exact same type of chromosome, but from the other parent. Because chromosomes come in pairs, they are homologous, meaning that they give different alleles (dominant and recessive) for the same trait. Search google images for karyotype to see the pairs.
@Bloodsteri667 Well, chromosomes may be identical to one another but they have different alleles of the same genes. For example, tongue rolling genotype. Your father may be homozygous dominant while your mother can be homozygous recessive. So during meiosis, different alleles are being mixed and matched together. As long as the genes in the same locus aren't different from each chromosome, they are 'identical genes'. It just means their made for each other as a homologous pair (:
HOW DOES RECOMBINATION RESULT IN GENETICALLY DIFFERENT CHROMOSOMES??? The chromosomes are both from the same person and so are surely homologous. Therefore if they swap at the same locus surely they will just be receiving exactly the same DNA? Can someone please explain.
For meiosis, the chromatin condense, and when chromosomes are formed within the nuclear membrane, homologous chromosomes pair together (a phenomenon known as "synapsis") and exchange traits. When the homologous chromosomes line up at the equator, they are pulled apart by centrioles and spindle fibres and form two new daughter cells. In mitosis, the two daughter cells contain chromatids. In meiosis, the two daughter cells contain chromosomes with mixed traits. Then it's mitosis over again.
@xEmperorOfTheSun - That's because first of all, you were made by two cells, one from your mother and one from your father. You have info from both all over and in each cell. Except at gonads, where you have half info and scrambled. Besides, as this is meiosis, (felritilaziton cells) coloured pairs is to show that info gets scrambled and divided twice instead of once as in mitosis :)
Hello, I want to ask permission to use this video -Meiosis- to a presentation of my research work with title: "Cell biology in Ancient Greek Vessel" which will be posted as video to You Tube from internet selfless channel "Frykturies".
17 years old & video still holds up.. these visualizations really help!
This type of vedio gets you curious and scared and nostalgic and de ju vi at the same time
why is my teacher making me watch a video that is almost 14 years old
Now it is 14 years old
yup
Same
@Nathan Ronco ikr
15
still gonna fail the test
i like that..
FIRE!!!!!!!!!!!
Did you fail it 😳
@@huh9290 lmao I can't even remember, this must be when I first learnt this stuff. Since then I've gone over this topic about 2 more times. It's actually not too difficult
@@NickGhale wow I didn't actually expect a response 👍
thanks. simple and blunt. dont need to sit on youtube watching a 15 min video on this shit when it could be said in 2 mins
+Big L LOOL
Big L fuck u
Best thing ever. Can't understand why people must make long and complicated videos to explain simple things.
oH MY THE R ES A MIEOSIS VERSION!!! I needed this in my life. Omg thank you ppornelubio you absolute saviour
POV you are watching this 15 years later
Great video, with a great and clear explanation with the animation and the audio.
Very useful, many thanks. I've struggled with so many BAD explanations or half-explanations of Meiosis. This helps a lot!
this music reminds me "age of empires 1+2"
I love the soundtrack for this.
Nice channel name XD
This vid really helped me on my exam. Thank ya!!
Who else is watching this cause there science teacher wants them to?
I watch this for the same reason, and I am Italian gg
@@mohamedsalvini GG imao
@@jonmartin7429 italian?
@@mohamedsalvini Norwegian I just found it funny that you wrote gg
i watched this class couple days ago...it is easier to understand Mitosis and Meiosis by watching and listening.
The low quality of this video almost makes it appear (incorrectly) that chromatid duplicates into sister chromatids in prophase II. But if you watch closely you can see this happens (correctly) earlier in prophase I. Homolog pairs separate first in meiosis I, and sister chromatids separate second in meiosis II.
Thank you for this video! I have an exam about this tomorrow, and this was very helpful!! :3
Why youtube don't have usefull videos like this one????
Congratulations
short sweet and to the point!
OH FINALLY I UNDERSTOOD THIS LESSON
The background music is so soothing.
"the cell prepares for meiosis just as it does for mitosis" -> nice rhyme
Then it's time to start considering an art major.
looks like you worked it out
Hello everyone it is Nick930 here, and today, we are doing a 100 player custom of me running people over in a racecar.
6 years later and still great!
Yep
@@josephwilson3180 yup
nice one :) do you have any idea how difficult it is to find a good video explaining meiosis, regardless of how brief? there might have been a few terms that were left out but whatever, those are asiders, i'm just happy this one is accurate. so many videos talk absolute kaka O.o
thanks a bunch :)
i actually love the music
yes you are right, I stand corrected!
Thanks for this wonderful video. saved me a l.ot of time
in the first division do nuclear membranes form before the cytoplasm splits?
Dude that made soo much sense now, 23 is half created my the father and mother and when combined they make the 46 needed!!
QUESTION
Is it the individual gametes (like female chromosome and male chromosome) that duplicates or is it the zygote (the combination of both the male and female chromosome) during interphase, just before meoisis occurs and all that pairing up?
the background music makes the video much more excinting and interesting!:D
great video!
Thanks for posting this! really helped me understand it :)
wow, my class during 40 minutes and i don't understand my teacher when he explain that, but now i understand everything clear, i'm from panama and i'm 14 years old thanks for the video
good video but i dont understand what they mean by miternal and feternal chromosomes? also does meiosis create cells that have more genetic distinctity thanks to crossing over or am i wrong? i have a test friday :S
me encanto deverian hacer una pelicula de 9 partes ^^
Atte.cristina mendez (CRusTy)
hey i realise this is quite important and easy once you get the hang of it. is it needed to state if its meiosis 1 or not? =X, just asking.
LOL @ the music at the end. It was the kind of music you'd expect in a Jane Austen movie when there's a random 'beautiful' english landscape view. Haha. But good vid, thanks.
Its bargainer to me thank you brother...dastt xosh her bjy
i dont understand if u start of with a diploid and divide once you get a haploid then divid a gain dont you only get a quarter of the genetic information??
Thanks a lot blilie, that is more understandable that what the video says.
THANK UUU SOOOOOOOOOOOOO MUUUUCHH this thing FTW
Below is a short description of what is seen in the video. It was sort of difficult to figure out cuz the video is way too fast. If you still don't understand there are many videos that describe this so much better :) But I hope this helps!
good and helpful, I use it in my explanation for the students, thank you very much and go ahaed
loving the runescape music :P
1 minute and 49 seconds my Biology teacher can discuss 5 topics at that time
When you were concieved, your zygote (you as a diploid cell with 2 complete sets of chromosomes [23 + 23 = 46 chromosomes]) was made up of 1 of your father's gametes (sperm cell containing 23 chromosomes) and 1 of your mothers gametes. You therefore have enough genetic info to mature, half from Dad and half from Mum.
Keep in mind that gametes do not have a full set of genetic info, only half (gametes are haploid).
Alya it goes on and never ends its going to keep happening and happening and it will never stop until you cant have a baby, kinda different but i will understand this anyhow
Thank you for the video. It help me a lot in my Biology.
this finally makes sense! have my semester exam tomorrow for biology.
*did you pass?*
Lavender :0 yessir
Louis B thats good to know😂
@RainfulPhenix i'm asking myself the same question. The only thing I can guess (and I'm probably wrong) is that in each of the parents there are chromosomes from both HIS parents (parents of the parent), and they are randomly mixed during meiosis, meaning that you could (for example) look more like your grandpa than your grandma (your mother's parents) even if their cromosomes were present in equal quantity in your mother's genome.
Mr Sivertson is awesome!
-love Rory
thanks a lot... wonderful job bunny
i just love science and vids like these make me love it even more
Thanks for putting this up ^.^ super help with revision
@randallsayshi but then how are they (the chromosomes from each parent) identical?
wow,thanks so much..this video really helped me to understand the meiosis.
This is my alternative to reading a book
Awesome video! Thank you so much!
In cells that are nto in the process of meiosis/mitosis, si the genetic material (DNA) normally unravelled?
@Sistarovat meiosis seems to be trasitional from mitosis...instead of PMAT making exact copies but PMAT-PMAT making copies with half sets that can recombine. since mitosis came first, evolution or descent with modification explains thsi nicely
what makes them homologous is the fact that one is from the mother and another is from the father and both of them ''unlock'' the same characteristics. is the best i can explain
The music is like in an adventure movie of the 60s
the music reminds me the music of the game "Shadow of the Colosus" of Play Station XD
Old, but so accurate and easy to understand
...what assassin's creed are you playing?
Valhalla lol
@syd2006 Fair enough. Care to share why?
It hardly went into any great detail, but it seemed fine as an introduction to the topic.
@AnarchyInTheUK1947
Yeah, that would probably be it.
I went from thinking of that to thinking that the homologous pairs were simply labelled mother and father because they produce "daughter" cells.
I'm not high enough for this
the best video for understanding meiosis
hly sh17, this explains everthing my teacher has said for the past 2 weeks!
Excellent explaination of meiosis
Meiosis confuses me. It was the one thing I couldn't grasp in Biology. I thought it took place the ovaries/testicles to make eggs/sperm. How does the cell get one chromosome from each parent if it's occurring there? Also, does one chromosome contain both alleles for a gene or just one?
love finding "ancient" (17 years) videos like this also I'm comment 700
Aren't the spindle fibers basically consumed the chromatids?
Hell of a lot better than the science textbook, i read the whole chapter at least 5 times, didnt understand it, then just watch this and get a better understanding in under 2 minutes.
great and informative video
I'm confused, the chromosomes divide twice? so 46 pairs >> 23 pairs >> 23 chromatids, then at fertilization, 23 chromatids + 23 chromatids = 23 pairs of chromosomes, so the dipload is not restored?! T^T please helppp
I think the number of organelles is increased during the interphase, then they are um kinda equally 'distributed' lol inside the cell, before cytokinesis but I could be wrong.
Profase I (Consists of 5 stages: Leptotene 0:5, Zygotene0:12, Pachytene at 0:27 (when crossing over occurs and the chiasma is formed), Diplotene 0:50 and Diakinesis 0:56 (nucleolus disappear). then Metaphase I at 0:58, Anaphase I at 1:02. Citokinesis (division of the cell) begins at 1:5 - 1:10 Then there is a second division that starts with Profase II that ends when the chromosomes migrate to the ecuator of the cell at 1:26, see "Continuation"below
Continuation>> very fast Metaphase II at 1:27 (Chromosomes are aligned in the ecuator but centromeres have not yet divided), Anaphase starts when the centromeres divide aprox. 1:28 and end when they have reached the poles at 1:33 then at 1:33 starts Telophase II when they uncoil, lengthen and stain less deeply, chromatin is formed, and the nuclear membrane and nucleolus reappear.
سبحان الله
ان الله على كل شئ قدير
thanks for uploading this i have my A2 exam tomorrow and this made it alot clearer (:
How'd it go?
@@huh9290 I got a D in Biology all those years ago! Did you realise how long ago that comment was?.. I did slightly better in my other two subjects thankfully (and I do mean slightly)
@@MrGraapes Well at least you passed.... Right?
I did know part of that.In class we were discussing different genetic syndromes.
I asked our professor if there was any evidence to show that a mutation (point mutation or at meiosis) resulted in usable increase of information.
The professor answered "No, but that is what we are working on right now".So, I assumed that there wasn't any "proven" evidence.Somatic hypermutation affects only individual immune cells, and the mutations are not transmitted to offspring. Got a web page I can check out?
There are DNA, ribosomes, mitochondrias, and amino acids, and others inside the cell. In the meiosis division process, each of the organelles have their own consciousness. And all of them work simultaneously. So we can say these organelles are very clever? Who is actually managing this collaborative team work? There must be technical director behind it.
16yrs later
the soundtrack reminds me of age of empires, good times.
At the start there were a bunch of x shaped objects around, one red one blue. Each x object was made up of two strings called chromatids, and each chromatid of the same color is genetically identical. The chromosome of the other color is the exact same type of chromosome, but from the other parent. Because chromosomes come in pairs, they are homologous, meaning that they give different alleles (dominant and recessive) for the same trait. Search google images for karyotype to see the pairs.
actually:
prophase I, metaphase I, anaphase I, telophase I, (possibly interkinesis), prophase II, metaphase II, anaphase II, and telophase II
@Bloodsteri667 Well, chromosomes may be identical to one another but they have different alleles of the same genes. For example, tongue rolling genotype. Your father may be homozygous dominant while your mother can be homozygous recessive. So during meiosis, different alleles are being mixed and matched together. As long as the genes in the same locus aren't different from each chromosome, they are 'identical genes'. It just means their made for each other as a homologous pair (:
you're not alone
thanks for uploading!!
i hate biology xD i have my final test tomorrow...now i'll have sum extra points :D
HOW DOES RECOMBINATION RESULT IN GENETICALLY DIFFERENT CHROMOSOMES???
The chromosomes are both from the same person and so are surely homologous. Therefore if they swap at the same locus surely they will just be receiving exactly the same DNA?
Can someone please explain.
but how does this chaismata occur
ie. hw does exchange of genetic material take place
For meiosis, the chromatin condense, and when chromosomes are formed within the nuclear membrane, homologous chromosomes pair together (a phenomenon known as "synapsis") and exchange traits. When the homologous chromosomes line up at the equator, they are pulled apart by centrioles and spindle fibres and form two new daughter cells. In mitosis, the two daughter cells contain chromatids. In meiosis, the two daughter cells contain chromosomes with mixed traits. Then it's mitosis over again.
my biology teacher sent me here i swear i'd never come by my own!
i betta pass this exam
I'm studying this in Biology right now, so this is very helpful thank you!
9 years ago, how are you doing now?
@@nikolaspasic8205 I'm well but I haven't taken additional biology courses.
@xEmperorOfTheSun - That's because first of all, you were made by two cells, one from your mother and one from your father. You have info from both all over and in each cell. Except at gonads, where you have half info and scrambled.
Besides, as this is meiosis, (felritilaziton cells) coloured pairs is to show that info gets scrambled and divided twice instead of once as in mitosis :)
Hello, I want to ask permission to use this video -Meiosis- to a presentation of my research work with title: "Cell biology in Ancient Greek Vessel"
which will be posted as video to You Tube from internet selfless channel "Frykturies".
so instead of duplicating itself in "interphase" it pairs up with it's homologus chromosome?
"Next comes the first shuffle of natures genetic deck" lawl biology