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== == Trisomy 21 is more of a chromosome abnormality/birth defect than a disease. It is also called Down syndrome. You cannot "catch" it; it is not infectious. According to statistics, women over 35 have a higher chance of bearing a baby with Trisomy 21 than do younger women. The theory is that, as we age, our chromosomes become "sticky" during the process of division. The amount of the chromosome that breaks off determines how functional or affected the offspring will be.
Although I have a bachelor's degree in genetics, you may want to get a more in-depth answer from a doctor or a genetic counselor.
Wiki User
∙ 16y ago
Wiki User
∙ 12y agoYes in almost all cases. That is why another common name for Down's syndrome is trisomy 21 (trisomy=3 copies of one chromosome, the 21 tells which chromosome has the trisomy).
There is another type of Down's that tends to run in families that is known as familial Down' syndrome. It is caused by a small part of chromosome 21 (the part containing the information that causes the Down's symptoms) is translocated (moved) to another chromosome. Usually chromosome 14 but, it could be others also. This gives the patient 3 copies of the genetic material that causes downs syndrome without them having 3 complete copies of chromosome 21
Wiki User
∙ 14y agoTrisomy 21 is a type of Down Syndrome and is the most common form of it.
Wiki User
∙ 12y agoBecause people with Down syndrome are born with and extra 21st chromosome.
Wiki User
∙ 10y agoTrisomy 21 is also known as Down's Syndrome
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What is Downs Syndrome also called?
Trisomy 21
Defect on chromosome 21 where a third chromosome is present what is this defect called?
This is trisomy 21 i.e. Downs syndrome
Where can you find information on Down syndrome in canines?
I searched for canine trisomy in the internet. It looks like they can have a trisomy 1 whcih causes some types of cancers, trysomy 13 (thyroid issues) and 18. The word is actually trisomyism. Downs is trisomy 21. Humans are also sometimes born with a trisomy 19. Each has it's own name after the doctor who discovered them, Edwards, Downs, and Bach. Did not find any canine with trisomy 21
Can Down syndrome be prevented?
Downs Syndrome, also known as trisomy 21, is a chromosomal disorder and, as such, cannot be avoided nor prevented.
What is the most common chromosomal abnormality in humans?
Trisomy 21, Down's syndrome
How does nondisjunction cause Trisomy 21?
it can cause Trisomy 21 because an extra chromosome can be added.
What is the relationship between trisomy 21 and Down syndrome?
Trisomy 21 is down's syndrome, which is an extra copy of chromosome 21
What part of the body is involved in Trisomy 21?
The root of Trisomy 21 is within the chromosomes of the body cells.
What is a common autosomal trisomy?
Something tells me that trisomy 21 is not really the most common, but it is the common among babies that actually live. Other trisomies common among live births are those of the 13th and 18th chromosome. Trisomy 16 is the most common known disorder of miscarried fetuses. Trisomy is caused by nondisjunction of a pair of chromosomes during meiosis or mitosis. What causes nondisjunction? If we could figure that out, we might be able put trisomies in the past.
What would trisomy 21 look like in a karyotype?
The trisomy 21 in a karyotype would look like extra chromosome 21 I ^^
What trisomy causes Down syndrome?
Down syndrome is caused by the presence of a third chromosome 21
When Having three copies of chromosomes 21 leads to a disorder known as trisomy 21 or more commonly as?
Down syndrome is trisomy 21
