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mud116Best ResponseYou've already chosen the best response.2
trisomy 21 is actually more commonly known as down syndrome
 one year ago

thecityBest ResponseYou've already chosen the best response.0
how many double chromosomes are there?
 one year ago

mud116Best ResponseYou've already chosen the best response.2
does that answer your question?
 one year ago

mud116Best ResponseYou've already chosen the best response.2
i do not know that but i don know that there is an extra 21'st chromsome hence the name trisomy 21
 one year ago

thecityBest ResponseYou've already chosen the best response.0
oh okay. thanks. normal humans have 46 double chromosomes right?
 one year ago

ebaxter01Best ResponseYou've already chosen the best response.0
Please note that it's "Down's syndrome" because it was described first by a physician named JL Down.
 one year ago

Karrie96Best ResponseYou've already chosen the best response.0
Ok, so basically trisomy 21 is another name for Down's syndrome. As you've already said, human's normally have 46 chromosomes, or twentythree pairs, which they are often divided into, because each pair looks similar. I'll include a picture. Anyways, normally each pair has 2, but in the event that there is a mutation, then there can be a monomy or a trisomy. A monomy is where there is only one of the two chromosomes in the pair, or a trisomy is an extra chromosome. So that's about it, hope the background info helps. :D
 one year ago

thecityBest ResponseYou've already chosen the best response.0
do you know how many double chromosomes there are? i know there are 23 homologous pairs
 one year ago

Karrie96Best ResponseYou've already chosen the best response.0
Here's a good pic to show you...
 one year ago
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