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== == 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.
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∙ 15y ago
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∙ 10y agoThere 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.
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∙ 8y agoIndividuals with Down syndrome have an extra 21st chromosome
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∙ 15y agoi dont know i am trying to find it for a project but i cant either HELP!!!!!
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∙ 11y agoIn some down syndrome cases the child will get 3 copies of a chromosome known as chromosome 21.
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∙ 13y agoDown syndrome, also called mongolism or trisomy 21, is caused by an abnormality in the development of chromosome 21.
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∙ 12y agoDown syndrome is a complete duplication of the entire 21st chromosome.
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∙ 11y agochromosome
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∙ 8y ago21
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What is the genetic disorder for having three 21 chromosomes?
down syndrome
What is the total amount of chromosomes do down syndrome children have?
21 chromosomes
What chromosomes do you get an extra copy for in humans that results in Down syndrome?
Down Syndrome is caused by a triplication of the 21st chromosome.
What is the diagnosis if you have 92 chromosomes?
down's syndrome
People with down syndrome have how many chromosomes?
47There are 47 chromosomes in someone with Down syndrome; the 21st pair has an extra chromosome. Most people have 46 chromosomes. Down syndrome is also known as "Trisomy 21" - a reference to the fact that someone with Down syndrome has 3 pairs of chromosomes on their 21st pair.
What happens if a person have more chromosomes?
If it had more chromosomes it will cause to down's syndrome
Down Syndrome most often occurs when-?
Down Syndrome often occurs when chromosomes fail to separate properly during meiosis.
How do you spell downsindrowm?
The phrase is spelled Down Syndrome. Down Syndrome is a disorder caused by a mutation of the chromosomes.
What is the number of chromosomes affected in down syndrome?
#21
Difference between the chromosomes of a person with Down syndrome and a person without Down syndrome?
An individual with Down Syndrome has the presence of all or part of an extra 21st chromosome.
Would a kartotype would be most likely be used to diagnose Down syndrome?
A person with Down Syndrome will have 3 chromosomes for the 21st autosome. Karyotypes show these chromosomes which help to diagnose Down Syndrome.
What chromosomes are affected in someone who has Down syndrome?
chromosome 21
