Hello Andrey, I want to take the time to comment and thank you. Your videos are always very clear, interesting, and informative. The best part, though, is your teaching style. You always ask the "what if," and "but why is that," questions, that inquisitive minds immediately jump to when having something explained to them. I'm virtually never left with any questions after watching your lectures because of this. You tend to repeat things a lot, making it hard for me to lose track of what's going on. I seem to have developed a proclivity for binge watching your lectures whilst consuming cannabis, lol. Makes the material even more interesting than it was to begin with! I sure am learning heap! Thanks man!
You're an amazing lecturer...we can see your passion...the effort you put in for students and science enthusiasts worldwide. We need more people like you.
I really like your teaching style. Your videos deserves a million views and your channel deserves a million subscribers. You never left any single important term that we need to know. Thanks a lot Andrey ! I hope you continue making videos.
I'm trying to get ahead in my biology class(because I really like the course) and this is really helpful, along with so many of your lectures. Thank you so much.
I appreciate the quality learning viayour body language, your rethorical skills, and the well put and explained information you give. Thank you. I hate to compare this to khan academy, but these lectures are on point. Very well made. Thank you.
Hi, thanks for your kind answer, I just found it a little confusing because the 2 centrioles of 1 centrosome always stay together and one centriole cannot decide to "get divorced" from its buddy to live a separate life at the other end of the cell
Hi, great and crystal clear! Many many thanks! But the centrosome which contains 2 centrioles is replicated during interphase. So during metaphase 1, each of the centrosome begin to move to opposite ends.
Yes, the centrosomes are replicated during interphase. But the centrosomes move to opposite sides before metaphase I. They move to opposite poles during prophase I of meiosis.
Can you answer this importation question? please?..... what do you use to record and what wireless mic do you use (on your shirt)? Ur encouraging me to make lectures!
so teacher when you are saying homolog chromosome are separating from each other and they are replicated and form a pair which contains two sister chromatide so these two sister chromatide thing is still 1 chromosome ( for example the red one which contains two sister chromatide ) isnt it?
Ak,,, I am in need of an explanation in the transformer genes and their effect on sex determination in drosophila ( expressed in homozygous and heterozygous forms ) please help me on this
Fantastically easily understandable lecture. But I think this video finished abruptly( may be not uploaded the summary of the lecture which AK usually give end of every lecture)
Why are prokaryontic cells not able to divide with meiosis? Like... Why does meiosis not occure in prokaryontic cells? Great lecture btw, I'm just preparing through all of them for my bio test :)
As in meosis,we take one purple chromosome and and one red in parent cell.....But why in mitosis or in somatic cell,we take both chromosome as black ......Why?
9:58 You say we have 4 individual Chromatids, but that term is technically wrong - right? There are 2 individual Chromatids with 2 identical (sister)chromatids.
Sir by the end of the telaphase 1 i think the produced cells are diploid not haploid because they contain 23 pair Am i right And thank you for these amazing lectures
Very good question, but you would end up with 23 haploid chromosomes after telophase I, not diploid. The reason is because telophase I splits the HOMOLOGOUS PAIRS into 2 separate cells, meaning, the 2 daughter cells DO NOT contain homologous pairs. However, the sister chromatids are still attached, which will get split after Meiosis II. Hope that answers your question.
shouldn't (meiosis I) produce two genetically different diploid cells with 46 chromosomes and (meiosis II) separates theses two cells to produce 4 cells with 23 chromosomes each? Great lecture by the way, it's that only thing that I think you got it mistaken
Thanks but in your lecture, you talk about centrioles which move.My point is I think it should be replaced by replicated centrosomes to be more accurate. The same remark applies for the mitosis lecture. thanks again!
Maxime Thumin Sure, I am not arguing with you that a centrosome consists of two individual centrioles (mother and daughter). But if the centrosomes move, and the centrosomes consist of a pair of centrioles each, its only logical to talk about the centrioles moving, right? More often than not, centrioles and centrosomes are used interchangeably. And in my opinion for good reason. But, you're correct, I should of been more explicit about differentiating between the two. :-)
Yeah you are right. The assumption should be that there are 3 pairs of homologous chromosomes which would lead to the formation of 3 tetrads in metaphase 1.
You're an amazing lecturer...we can see your passion...the effort you put in for students and science enthusiasts worldwide. We need more people like you.
Hello Andrey, I want to take the time to comment and thank you. Your videos are always very clear, interesting, and informative. The best part, though, is your teaching style. You always ask the "what if," and "but why is that," questions, that inquisitive minds immediately jump to when having something explained to them. I'm virtually never left with any questions after watching your lectures because of this.
You tend to repeat things a lot, making it hard for me to lose track of what's going on. I seem to have developed a proclivity for binge watching your lectures whilst consuming cannabis, lol. Makes the material even more interesting than it was to begin with! I sure am learning heap! Thanks man!
You're an amazing lecturer...we can see your passion...the effort you put in for students and science enthusiasts worldwide. We need more people like you.
8:49 if you want to see the whole board
You can download his notes by going his website
I really like your teaching style. Your videos deserves a million views and your channel deserves a million subscribers. You never left any single important term that we need to know. Thanks a lot Andrey ! I hope you continue making videos.
I luv this brother right here.....and am not gay.the delivery is perfect he articulates everything so well.....some one give him an award please
I am a teacher in High school in sierra Leone. I have learnt a lot watching these videos. God bless dear. Jesus Is Lord
you have made me understood by just listening halfway. thank you so much. i love your videos.
I'm trying to get ahead in my biology class(because I really like the course) and this is really helpful, along with so many of your lectures. Thank you so much.
Doctor you really saved my life I didn't understand anything about genetics because I misunderstood meiosis from the heart all love🌹🌹
You explain clearly,thank you.❤️❤️
I love your lectures Sir, it has been helping me in my studies. Love from Nigeria.
You are a blessing Dr AK. Thank you very much
I appreciate the quality learning viayour body language, your rethorical skills, and the well put and explained information you give. Thank you. I hate to compare this to khan academy, but these lectures are on point. Very well made. Thank you.
Thank you. Great! Been looking for this for several days!
Thank you Andrey for the lecture. i always follow your lecture even when i took my midwifery course. now im taking my degree and still with you.
Dear Andrey your lecture is boon for students and lecturers .Thank You
Which stage of mitotic and meiotic division does the cell experience equilibrium of forces?
Many thanks for all your videos.
This guy is so good
What a helpul lecture. Thank you for your work.
Hi, thanks for your kind answer, I just found it a little confusing because the 2 centrioles of 1 centrosome always stay together and one centriole cannot decide to "get divorced" from its buddy to live a separate life at the other end of the cell
excellent....it's really helpful both for teachers and students.
that's very helpful , thank u very much , u're talented man !
You have not discussed about Leptotene,Zygotene,Pachytene,Diplotene and Diakinesis in the Prophase-I
you are one amazing man!
You are the best man thanks a lot
i was confused in this lecture but now i am Belsed by your lecture😋😋.
10q teacher it was belssed video
I love this guy
Hi, great and crystal clear! Many many thanks! But the centrosome which contains 2 centrioles is replicated during interphase. So during metaphase 1, each of the centrosome begin to move to opposite ends.
Yes, the centrosomes are replicated during interphase. But the centrosomes move to opposite sides before metaphase I. They move to opposite poles during prophase I of meiosis.
thanks a lot!!!!! you are the best!!!
Omgg thank you so much... u helped me alot here
Thank youuu😊 your video is absolutely amazingg😬 help me a lottt, thanksss😬
Can you answer this importation question? please?..... what do you use to record and what wireless mic do you use (on your shirt)? Ur encouraging me to make lectures!
so teacher when you are saying homolog chromosome are separating from each other and they are replicated and form a pair which contains two sister chromatide so these two sister chromatide thing is still 1 chromosome ( for example the red one which contains two sister chromatide ) isnt it?
Thanks a lot...
Ak,,, I am in need of an explanation in the transformer genes and their effect on sex determination in drosophila ( expressed in homozygous and heterozygous forms ) please help me on this
Fantastically easily understandable lecture.
But I think this video finished abruptly( may be not uploaded the summary of the lecture which AK usually give end of every lecture)
sir........ why centrioles replicates. why not a single centriole on both poles forms spindal fibers. thanks very much
Thanck you, fantastic
Why are prokaryontic cells not able to divide with meiosis? Like... Why does meiosis not occure in prokaryontic cells?
Great lecture btw, I'm just preparing through all of them for my bio test :)
Thanks so much ☺️
You are awesome 😁😁
i want to ask you ? why you do this , record this lecture and help people , you are very amazing
As in meosis,we take one purple chromosome and and one red in parent cell.....But why in mitosis or in somatic cell,we take both chromosome as black ......Why?
in both all.. 46 chromosomes r replicated.. but difference is only in crossing over . ....
im just following your lectures '' u say things
Thaks for your lesson
9:58 You say we have 4 individual Chromatids, but that term is technically wrong - right? There are 2 individual Chromatids with 2 identical (sister)chromatids.
Chromatin contain DNA and Protien and small quantity of RNA what id the role of this RNA
can anyone answer this question of mine- There are 23 pairs of chromosome in a somatic cell, how are the chromosomes paired in the somatic cell?.
46
Sir by the end of the telaphase 1 i think the produced cells are diploid not haploid because they contain 23 pair
Am i right
And thank you for these amazing lectures
Very good question, but you would end up with 23 haploid chromosomes after telophase I, not diploid. The reason is because telophase I splits the HOMOLOGOUS PAIRS into 2 separate cells, meaning, the 2 daughter cells DO NOT contain homologous pairs. However, the sister chromatids are still attached, which will get split after Meiosis II. Hope that answers your question.
Very good question.... They may look like 46 (with sister chromosome) but the actual number in that chromosome (with sister chromosome) is only 23
@Endangered species
Yes, they are not identical
tysm
shouldn't (meiosis I) produce two genetically different diploid cells with 46 chromosomes and (meiosis II) separates theses two cells to produce 4 cells with 23 chromosomes each?
Great lecture by the way, it's that only thing that I think you got it mistaken
No. Meiosis I produced two haploid cells and these two cells divide (meiosis II) into two cells identical to them (haploid)
Thanks but in your lecture, you talk about centrioles which move.My point is I think it should be replaced by replicated centrosomes to be more accurate. The same remark applies for the mitosis lecture. thanks again!
Maxime Thumin Sure, I am not arguing with you that a centrosome consists of two individual centrioles (mother and daughter). But if the centrosomes move, and the centrosomes consist of a pair of centrioles each, its only logical to talk about the centrioles moving, right? More often than not, centrioles and centrosomes are used interchangeably. And in my opinion for good reason. But, you're correct, I should of been more explicit about differentiating between the two. :-)
hi.im not a biolog but im interesing to know about in which day of menstrual cycle prophase 1 of meiosis 1 end begin metaphase 1 .thank you
hi.im not a biolog but im interesing to know about in which day of menstrual cycle prophase 1 of meiosis 1 end begin metaphase 1 .thank you
hi.im not a biolog but im interesing to know about in which day of menstrual cycle prophase 1 of meiosis 1 end begin metaphase 1 .thank you
hi.im not a biolog but im interesing to know about in which day of menstrual cycle prophase 1 of meiosis 1 end begin metaphase 1 .thank you
16:10 clear views of the board.
luv ya
there is 3 pair of chromosomes in the picture not 6 pair of chromosome correct?
Yeah you are right. The assumption should be that there are 3 pairs of homologous chromosomes which would lead to the formation of 3 tetrads in metaphase 1.
please make some videos for immunology,I give exams on 12th and i'm in a hurry XD pleaaaaase
already have some. check my website.
Progress.
I love your lectures but I wish if you could talk faster. Thanks
rand esber speed up video. I listen at double speed always
Emkay thanks a lot for help!
I think it is the best part of him as we( non- English) people can understand it clearly.
9:14
The whole board
16:11 is a better view
Hello 2b potangina wla kong naiintindihan ser
You're an amazing lecturer...we can see your passion...the effort you put in for students and science enthusiasts worldwide. We need more people like you.
Which stage of mitotic and meiotic division does the cell experience equilibrium of forces?