Cell Division: Stages of Meiosis | A-level Biology | OCR, AQA, Edexcel

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  • Опубліковано 4 лют 2025

КОМЕНТАРІ • 80

  • @cookingmadesimple8678
    @cookingmadesimple8678 5 років тому +70

    FANTASTIC! THANKS THIS HELPLED SO SO SO MUCH, YOU MADE IT MUCH MORE CLEARER THAN MY BIO TEACHER COULD IN 3 LESSONS. PLEASE CONTINUE TO MAKE THESE FANTASTIC VIDEOS

  • @alyasa7617
    @alyasa7617 4 роки тому +253

    This is a confusing topic

  • @Melopni
    @Melopni 3 роки тому +20

    This is so helpful before having end of year exams!! Thank you so much

  • @jadelep6364
    @jadelep6364 2 роки тому +11

    This video helped me understand this so much better! Great for last minute cramming for my a level paper today... Thank you so much!

  • @nirubanaravinthan2284
    @nirubanaravinthan2284 5 років тому +93

    You c the part u explained about crossing over
    I understood it but it appeared 2x which kinda confused me but then realized u were repeating the same thing.
    Since chromosomes replicate i think u replicated a section of this video
    thx anyway

    • @samarasharfuddin2380
      @samarasharfuddin2380 4 роки тому +17

      LOLLLLLLL i was also thinking the same,i got confused too, anyway thanks now ik it was the same thing :)

    • @revision9709
      @revision9709 4 роки тому +11

      He gave the example of replication by replicating the parts lmao

    • @josiewatson6349
      @josiewatson6349 3 роки тому +1

      Yeh ahhaha I thought I’d accidentally rewound the video or something

  • @jaredfranklin
    @jaredfranklin 3 роки тому +13

    I still find this topic confusing, but thank you as it I understand it much more now. :)

  • @smartwhip.
    @smartwhip. 5 років тому +94

    1:10 you said 26 instead of 46 by accident g

  • @ettigarrett7645
    @ettigarrett7645 4 роки тому +4

    you SAVED ME thank you!! I didn’t understand at all when just looking at the book

  • @melissa-en7jm
    @melissa-en7jm 24 дні тому

    Hi! your videos are SUPER helpful. I was wondering if you had a video on mutations? Thank you!

  • @eireannmcauley1130
    @eireannmcauley1130 3 роки тому +6

    hi, the description of independent segregation completely contradicts a comment made earlier on-when talking about meiosis 1- in the video: at timestamp 3:18, you state " as we said, the copies from dad go in to one cell, and the copies from mum go in to the other cell". However when explaining independent segregation at timestamp 11:40 you explain how when lining up in metaphase 1, the line up is random, resulting in blue and purple chromosomes to be together....

    • @MCSjojo
      @MCSjojo Рік тому +1

      yeh i noticed this, the statement at 3:18 is just straight up wrong

  • @exildahkapasa8051
    @exildahkapasa8051 3 роки тому +2

    Though meiosis a bit confusing, Thank you its so helpful 🙏

  • @nepheleartist
    @nepheleartist 3 роки тому +3

    That was really helpful for revision!! thank you :)

  • @christopheromoya535
    @christopheromoya535 Рік тому

    Great explanation

  • @eacl524
    @eacl524 3 місяці тому

    thank you nice video you earned a sub

  • @antoinefillie8473
    @antoinefillie8473 Рік тому

    Thank you as always

  • @maryavornyo5066
    @maryavornyo5066 3 роки тому

    This was really helpful. Thanks

  • @rehnumachowdhury3629
    @rehnumachowdhury3629 4 роки тому +6

    Mate I love you

  • @zahrakosgi9290
    @zahrakosgi9290 3 роки тому +3

    This is super helpful but you missed stages like leptotene, zygotene, pachytene, and diplotene… anyway the video was awesome! 👏👍

    • @alexbc7464
      @alexbc7464 Рік тому +3

      don't think you need this for a level!

  • @williamhinton9741
    @williamhinton9741 3 роки тому +1

    Amazing video, Thank you!!

  • @Siigrit
    @Siigrit 2 роки тому

    Is this enough detail for a level?

  • @tyrese-tureicuthill531
    @tyrese-tureicuthill531 3 роки тому

    So what’s he trying to Homologous pairs is 1 copy from dad and 1 copy from Mum joined together.After replication there is 2 copy’s of dad and 2 copy’s of Mum joined together right?

  • @ayeshaali8863
    @ayeshaali8863 4 роки тому +4

    Nuclear membrane disintegrates in prophase 1or in metaphase 1? I watched another video. I watched it disappeares in metaphase but u said it disappeares in prophase

  • @aggiejay4885
    @aggiejay4885 3 роки тому

    Its great to be taught by you

  • @mallujishnu
    @mallujishnu 4 роки тому +2

    super sir...your videos are just awesome.....

  • @fahadali3827
    @fahadali3827 3 роки тому +17

    this video wasn't as clear as other videos u make can't lie

  • @uplift3771
    @uplift3771 5 років тому +8

    is this AS level?

  • @stevejones3662
    @stevejones3662 9 місяців тому

    I think there are some mistakes early on in this video...Around Homologous Chromosomes early on. Easily done as it is complex.

  • @hocustar4641
    @hocustar4641 3 місяці тому

    danke

  • @shaziekhan639
    @shaziekhan639 5 років тому +5

    What does maternal and paternal mean ?

  • @priyankalakhia7469
    @priyankalakhia7469 5 років тому +2

    After meiosis 2 when you say they “split” into 4 cells is it because of cytokinesis? Would you call that cytokinesis 2? Or do they just “split”

    • @imogenyoungs4069
      @imogenyoungs4069 5 років тому +2

      He says cytokinesis :)

    • @ponamk9374
      @ponamk9374 5 років тому +2

      yeah its because of cytokinesis there is no such thing as cytokinesis 2 :)

  • @svbalu23
    @svbalu23 3 роки тому +1

    Dear sir as i have studied from my teacher's, meiosis take place in gametic cell formation. Its separately take place in male and female to form sperm and ovam. How come in this video at meiosis during interphase you are explaining about dad and mom together?

    • @verorl9072
      @verorl9072 2 роки тому

      females have DNA from their fathers AND mothers in their cells which is why he refers to it as the male DNA

    • @idiotsandwichthe1st
      @idiotsandwichthe1st 2 роки тому

      Because human cells have chromosomes from the mother and the father. So when the cell divides, both mom's and dad's chromosomes will be present.

  • @TaylorS0410
    @TaylorS0410 4 роки тому +5

    Mum and dad? I thought meiosis is making more sex cells, so for a female it would be making more egg cells? Why are there mum and dad genes here?

    • @jlc5271
      @jlc5271 4 роки тому +1

      Because your sex cells contain DNA

    • @amnoxia
      @amnoxia 4 роки тому

      Because you have dna from mum and dad and it's your dna that splits into multiple sex cells

    • @evie9748
      @evie9748 4 роки тому +4

      when you were born you got DNA from your mum and dad. so each homologous pair of chromosomes actually include one from your mum (maternal) and one from your dad (paternal). then when you make gametes, these chromosomes (with different genetic material) are put into different cells by meiosis in many different ways to create genetic variation. (okay sorry if i actually suck at explaining but hope you don't get even more confused by my explanation)

    • @TaylorS0410
      @TaylorS0410 4 роки тому +2

      Ohhhhh thanks guys, that cleared it up :D

    • @alliyahloadwick2109
      @alliyahloadwick2109 3 роки тому

      @@evie9748 this helped me so much thankyou !

  • @rebeccathompson9774
    @rebeccathompson9774 3 роки тому +2

    did this guy just repeat crossing over about 826 times

  • @evelynj1430
    @evelynj1430 2 роки тому

    You said we have 26 pairs???!

  • @poppy6563
    @poppy6563 3 роки тому +5

    why do you always say youll finish with a summary and never do a summary lmao

    • @launchpadlearn
      @launchpadlearn  3 роки тому +1

      The videos with the summaries at the end can be found on our website snaprevise.co.uk. I suggest that you go and check it out! You can also find there some free resources like revision guides, quizzes, cheatsheets, and a lot more! 😊

  • @marcadams440
    @marcadams440 4 роки тому +4

    Audio is really quiet. Excellent otherwise

    • @rehnumachowdhury3629
      @rehnumachowdhury3629 4 роки тому +7

      From my phone and laptop the audio is fine maybe it is your gadget?

    • @marcadams440
      @marcadams440 4 роки тому +1

      @@rehnumachowdhury3629 Maybe. Works fine with other videos though.

    • @Frisklordofyoutube
      @Frisklordofyoutube 4 роки тому

      yeah i agree the audio is relay low. the video was very useful.

    • @ashishzachariah1373
      @ashishzachariah1373 4 роки тому +8

      Increase your volume

    • @Frisklordofyoutube
      @Frisklordofyoutube 4 роки тому +16

      @@ashishzachariah1373 i cant believe i didn't think of that! genius.

  • @fatimasalakovic9985
    @fatimasalakovic9985 Рік тому

    46 pairs , not 26