Trisomy 21 is a condition that occurs during meiosis in sex cell division. This means the production of egg and sperm cells. This condition is when cells do not reproduce properly, also called nondisjunction. This causes one gamete to have 2 #21 chromosomes. When this is combined with the opposite gamete, it causes there to be 3 #21 chromosomes. In a "regular" human,m there are 46 chromosomes overall. In a person with Trisomy 21, there are 47.
This is what happens for persons who have what is diagnosed as "down syndrome". It is because the person has too MUCH genetic information.
Some of the symptoms of Down Syndrome, or Trisomy 21 are:
-mental retardation
-wide range of mental abilities
-round, full face
-enlarged and creased tongue
This is what happens for persons who have what is diagnosed as "down syndrome". It is because the person has too MUCH genetic information.
Some of the symptoms of Down Syndrome, or Trisomy 21 are:
-mental retardation
-wide range of mental abilities
-round, full face
-enlarged and creased tongue
Example 1:
Joe: "Did you hear about the new kid? He has down syndrome! Poor guy!"
Bob: "We learnt about that in Bio class!"
Example 2:
Joe: "Your mama is sooo fat..."
Bob: "Oh ya?! Well, you have Trisomy 21!"
Joe: *silence*
Joe: "Did you hear about the new kid? He has down syndrome! Poor guy!"
Bob: "We learnt about that in Bio class!"
Example 2:
Joe: "Your mama is sooo fat..."
Bob: "Oh ya?! Well, you have Trisomy 21!"
Joe: *silence*
by light=2.997924562 November 21, 2011
Get the Trisomy 21mug. Yo man you should go up to your girl and surprise her by hugging and kissing that loving bitch from behind!!!!! Cause it’s October 21 man!!!!!!!
by JamieWood October 19, 2019
Get the October 21mug. National: Buy Kuhle Hadebe whom is 13 years of age turning 14 years old, who lives in South Africa Gauteng food day
by OfficialNationalDay May 20, 2021
Get the May 21mug. by Shiba🤧🤧 October 20, 2019
Get the October 21mug. by im big daddy bitch 🥴 April 19, 2019
Get the august 21mug. 
by brooke March 30, 2003
Get the 4:21mug.