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Chromosome 21 is tripled in Down syndrome.
No, Down's syndrome is only a human genetic disorder. Those with the disorder have an extra chromosome. Raccoons do not get this particular genetic disorder.
Angelman syndrome is a genetic disorder, as is Down syndrome. But they are not the same. Angelman Syndrome involves a deletion of Chromosome 15, whereas people with Down syndrome have an extra copy of Chromosome 21.
You do not "get" Down's syndrome. You are born with it. It is a chromosomal condition of the 21st chromosome.
== == 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.
Down syndrome is a chromosomal disorder. It is caused by having 1 extra chromosome (chromosome 21).
Down syndrome occurs because of the extra chromosome on chromosome 21. If you go onto google images and type in karyotype of Down syndrome, you will find a picture of the extra chromosome. Instead of having two chromosomes on chromosome 21, there is an extra. Type your answer here...
Chromosome Disorder
Down Syndrome is caused by extra genetic material on Chromosome 21. About half of the children of people who have Down Syndrome are born with Down Syndrome themselves. See the Related Linksbelow to view an article about the genetics of Down Syndrome.
Down syndrome
Down Syndrome is caused by a triplication of the 21st chromosome.
Down Syndrome is when there is an extra chromosome in someones DNA. More exactly it is when the 21st chromosome has an extra one.