Aneuploidy and Nondisjunction

[@marcelofa89]

You explain it like the viewer is 5 years old. It's exactly what I needed

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When you brought out the extra whiteboard! Really shows your dedication to quality educational videos Thank you!

[@217nomiga]

i owe this man my career. he gives every knew structure context and reexplains things and i love it.

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Thank you for spending your time to explain these concepts. Your teaching style is concise, simple, and effective. Wherever you are in life I wish you the best!

[@cizzy1290]

phenomenal lectures! so glad to find your channel while studying genetics! Many thanks!!

[@barbaratorres6589]

This is a really well done explanation of this topic, i struggled so much to understand this whole process as my uni taught it at a very fast pace and this saved me completely! thank you so much

[@missebasit4852]

my exams are finished and i'm still watching your videos because you make biology so interesting lolololol

[@AKLECTURES]

+inkxck 97 lol! thats awesome! congrats on finishing your exams though :)

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Then you are genius

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just passed my biology exam in biology at medschool, all thanks to this guy!

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One of the best lecturers I know...you truly are the best

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I want to go into something in genetics and I’m binge watching all your genetics lectures

[@ranvirghosh196]

you are an angel...brother great work...

[@BoogieDownProduction]

AK lectures coming in clutch yet again

[@Lovely-bh3ln]

Perfect video on this topic hands down

[@kellieashton3697]

Awesome video! I was hoping to get a good explanation of polyploidy too but you explained aneuploidy and non-disjunction so awesomely, thank you!

[@shaharieryasin6086]

Sir, thank you very much. You have mention all the process , there no information gap. Thats why it become so much easy. Once again thank you

[@fishytuna1626]

You teach better than my professors !!

[@kellyakinyi9765]

Thankyou very much

[@syzy1442]

thank you so much for this. It really helps me in catching up with my online lessons this quarantine.

[@pawankumar8337]

very nice vedio lecture sir cleared my all doubts

[@pawankumar8337]

my exams are very near and l had losted my hope means to clear this concept but u explained very nicely

[@goharali4178]

U explain everything very clearly sir the way u teach is unique and fabulous I listen ur every lecture I m addict to ur lectures I m ur greatest fan ..sir I have one request also sir that plz start biotechnology chapter after this chapter thanks alot .

[@chrzanowska61]

Great job!🎉 Thank you

[@miguelgabrieltv1091]

there is confusion somewhere because Aneuploidy of the sex chromosomes is less serious than that of the autosomes. but you said. Very little genetic material only about 40 genes is located on the Y chromosome. For the X chromosome, the inactivation of extra chromosomes largely diminishes their effect. A zygote bearing no X chromosome, however, will not survive.

[@mikanhyuuga1]

I'm a high school student, and this was very well taught from the video, thank you very much! hope I do will on my assessment on this tomorrow! :)

[@nellyandonova4454]

Very good work. Thank you very much.

[@Delfine04]

I think there's a tiny mistake in this video, I think that the chromatids go to the opposite side of the cell, so the left sisterchromatid goes to the right and the right one to the left during mitosis. Greetings from Belgium!

[@TravelTales-p8v]

outstanding lecture dear sir i really likeyour lecture it is very clear

[@mohammedal-hammadi5085]

So great lecture, thank you so much

[@TheRealBrandonGlenn]

23 pairs of homologous chromosomes in females because (XX). In males its 22 pairs of homologous chromosomes because (XY).

[@m.al.alhassany7882]

thank U very much...@AKLECTURE

[@cajesnoli5493]

What cytological abnormalities are expected of aneuploids at mitosis? At meiosis?

[@loslosxoxo8345]

Please answer this question " An organism has an extra chromosome in all its cell is a result of? My instructor answer is Gene mutation, but one of the choices is Polyploidy. what is you're answer sir?

[@priyathakur9930]

You explained that during anaphase, there are 46 chromosomes moving this way and 46 chromosomes moving the other way. But ideally there should be 23 chromosomes moving towards right and 23 chromosomes moving towards left coz we have 46 chromosomes and 23 chromosome pair/somatic cell. Correct me if I am wrong....

[@kellieashton3697]

Well, when the chromosomes are separated by the spindles they are then as chromatids considered "chromosomes" as well... and during mitosis there would be 46 of these moving to either pole. So think chromatids, not chromosomes if that helps? But they're still referred to as chromosomes.

[@lunanaw5867]

GREAT EXPLAINATION!!!THANK YOU

[@mbybdnemo1829]

Going to be imbibing these, cheers for the exam-save

[@pratibhamali3845]

Great lecturer

[@RZYP32]

great review? thank you very much sir!

[@MaryaM-ov9bq]

Helpful!

[@abodaustin8167]

very nice, but it is so low sound 🔊

[@hinag7410]

thank you! this helped me a lot :)

[@BRVERMA-zo3de]

How much long DNA can involve in a chromatin fiber of 25 nucleosome.? Ans pls..

[@chisomchukwu5335]

absolutely amazing !!

[@auzanwidhatama9421]

I have a question, Sir! Is it possible non-disjunction occurs in both meiosis phase, meiosis I and meiosis II? If it is what would happen next?

[@steelersMIZ]

Thank you!

[@maktabi7754]

sir can non disjunction takes place in all 23 pairs ? if it happens then what are the sequences

[@LA-cm9uo]

Hi, non-disjunction can (in theory) happen in any chromosome. Most of the autosomal chromosomes are vital for a fetus to develop. In most cases of autosomal non-disjunction, the fetus will die before birth. There are some exceptions, such as Trisomy 21 = Down Syndrome.

[@jjii9209]

I believe that the picture of the non-disjunction in sperms is incorrect. Instead of a spermatogonium, isn't it the primary spermatocyte?

[@AKLECTURES]

The diagram is correct. Primary spermatocytes exist before the onset of meiosis II but after meiosis I took place.

[@jjii9209]

Oh ok thank you so much! I was confused on that part....

[@jjii9209]

I'm sorry but I just have one more question: Does the spermatogonium create one other spermatogonium along with a primary spermatocyte? And does that primary spermatocyte create secondary spermatocytes? Thank you.

[@shraddhabhardwaj7596]

+jj ii i hope this helps you. Spermatogonia does produce other spermatogonium mitotically, before maturing to primary spermatocyte. Primary spermatocyte then follows meiotic division and forms secondary spermatocyte in meiosis -I .

[@abdullahkamal1898]

awesome!!!!!

[@vinitayadav1316]

Can anyone tell me how can one cell contain both XX,XY as shown in video during nondisjunction in meiosis 1

[@KendallMooreProfile]

vinita Yadav it’s xx and yy

[@Chris-eo2in]

Can someone explain how we have 23 pairs of homologous chromosomes. Pretty sure for at least men we have 22 and then and x y. So not 23. I don’t know why you would start the video off with something wrong

[@stephaniemiller5165]

To low tune the volume up!!!

[@mohsinjutt1374]

well

[@urTrickybro]

Where is polyploidy??

[@Chemistry-r3f]

it can be found in plants and some fish and amphibians, u know , it is more common in plants we eat

[@alaluqman8548]

👍👍👍

[@MeMe-qv6ho]

Safe fam

[@spooky8755]

Please speak lil louder

[@Chris-eo2in]

For real that’s annoying as shit. No one refers to a guys x and Y chromosome as homologous sex. Chromosomes. They are not the same size or centromeric position. Nor do they have the same gene content. This is the problem with KZbin

[@BrinkersMad]

7:30 i hear sirens haha

[@AKLECTURES]

+BrinkersMad as you should. I live next to a hospital in a very populous city.

[@okwill6732]

But...but...my sociology professor said that a person can change their sex....lol

[@nitinpabli1888]

Hindi ma

[@ambikabastola882]

talk too fast

[@mariancastro163]

CRACK :)