Down syndrome (trisomy 21) - causes, symptoms, diagnosis, & pathology

What is Down syndrome (trisomy 21)? Down syndrome is a set of symptoms that arise from a genetic abnormality, in which an individual’s cells have an extra copy of chromosome 21. Find more videos at

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31 comments on “Down syndrome (trisomy 21) – causes, symptoms, diagnosis, & pathology”

Carl Hamilton May 25, 2020 at 9:50 pm

Okay so a kid with this disease is handsy with people of the opposite sex. Is that something that's common or is that not related to the disease?

Dr.Najeeb Lectures May 25, 2020 at 9:50 pm

Great content by Osmosis team👌

Isabella Charlize May 25, 2020 at 9:50 pm

If you wanted to make another human, first you'd have to find someone that feels the same way.

what a god

Marcel Pock May 25, 2020 at 9:50 pm

My sister has Down Syndrome. She can't speak, she has to be held by her hand so she can walk. Millie is the best sister that I ever had, even though she is 11 and i'm 15, i love her and i can't imagine a better sis. If you are mean to her, i'm not your friend.

Martina Corradi May 25, 2020 at 9:50 pm

non c'ho capito nulla

Raja Sundaram May 25, 2020 at 9:50 pm

Trisomy 18 eny broblem aaaa

Shambhavi Kulkarni May 25, 2020 at 9:50 pm

The best video i've seen for this topic.

shrek 122223 May 25, 2020 at 9:50 pm

It’s doesn’t go from 46 to two cells with 23 to four cells with 23. It goes from 46 to two cells
with 46 then to four cells with 23

Mike Black May 25, 2020 at 9:50 pm

I need to know more

Lg G3 May 25, 2020 at 9:50 pm

4:21 "so there are a few ways that this can go DOWN" 😉😉😉

Abeer Farman May 25, 2020 at 9:50 pm

This is really hard for me

g May 25, 2020 at 9:50 pm

is it just me or does this guy sound kinda like zach from the try guys

Karzan Aziz May 25, 2020 at 9:50 pm

thanks

PastaSauce 7 May 25, 2020 at 9:50 pm

Did he … just say "less cells"?

Twice???

Sukanya Dash May 25, 2020 at 9:50 pm

I love this video… 😊😊

Starkiller May 25, 2020 at 9:50 pm

I hope my kids won’t be mentally retarded with Down syndrome or something. Why don’t people abort down syndrome kids before they are born. It’s just depressing letting kids with downs into this world.

Natsuki Gaming May 25, 2020 at 9:50 pm

Umm whaaaaa…..??

Mitchell Jenkins May 25, 2020 at 9:50 pm

Respect to the homies with extra chromies

Elice Brown May 25, 2020 at 9:50 pm

jyoti bansile May 25, 2020 at 9:50 pm

Amazing explaination thanks Osmosis

Sapna Kashyap May 25, 2020 at 9:50 pm

In Robertsonian translocation ,why sperm carries pair and in disjunction sperm carries only single chromosome?

Mayur Bramhane May 25, 2020 at 9:50 pm

So nicely explained

Henrique A. May 25, 2020 at 9:50 pm

Thank you for the explanation of the Robertsonian translocation!

Oscar Ramirez May 25, 2020 at 9:50 pm

You lost me at the chromosome..

poopy cup May 25, 2020 at 9:50 pm

all those scientists went thru the trouble to figure these complex stuff out just for kids like us to blame them for making us study

Zepcro ML May 25, 2020 at 9:50 pm

I dontttt understanddddddddd

Medilyfe May 25, 2020 at 9:50 pm

In terms of heart defects, he states between the two atria (producing an ejection systolic murmur) being most common ('usually') but note the most common is an AVSD, which produces a holosystolic of course, along with VSDs
Prevalence
AVSD: 29%
VSD: 21.5%
ASD: 19.9% (EJ murmur)

So you will most likely hear a holosystolic murmur

source for chd prevalence ; Benhaourech, CHD & down syndrome

Lysol God May 25, 2020 at 9:50 pm

so basically saying, find someone with 23 chromosome pairs

Gh May 25, 2020 at 9:50 pm

I understand nothing

Motivation Time May 25, 2020 at 9:50 pm

Outstanding…….

Mashael Alansary May 25, 2020 at 9:50 pm

I made it to min 6… then my brain melted out of my ears :S

Down syndrome (trisomy 21) - causes, symptoms, diagnosis, & pathology

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