What chromosomes is the code for down syndrome located on?

Answer 1

== == Down syndrome, also known as "Trisomy 21," is not caused by a single particular gene or DNA sequence. Rather, Trisomy 21 is caused by the presence of an "extra" chromosome 21 in the set inherited by a Down syndrome patient. The normal chromosome number is 46 (consisting of 2 sex chromosomes, XX or XY, and 44 non-sex chromosomes); Trisomy 21 patients thus have 47 and are denoted as 47, t21.

Answer 2

There isn't exactly a "Down Syndrome gene". Down Syndrome is properly called trisomy 21; it's a defect where there are three, rather than two, copies of chromosome 21 present in the cell nucleus. In some cases the "extra" copy may be only partial.

Answer 3

Individuals with Down syndrome have an extra 21st chromosome

Answer 4

i dont know i am trying to find it for a project but i cant either HELP!!!!!

Answer 5

In some down syndrome cases the child will get 3 copies of a chromosome known as chromosome 21.

Answer 6

Down syndrome, also called mongolism or trisomy 21, is caused by an abnormality in the development of chromosome 21.

Answer 7

Down syndrome is a complete duplication of the entire 21st chromosome.

Answer 8

chromosome

Answer 9

21