Downs syndrome is caused by having 3 copies, trisomy, of chromosome 21 in your DNA. This can be random, causes are often unknown although it is associated with increased maternal age. Symptoms include characteristic facial features, varying degrees of mental retardation/learning difficulties, a happy and sociable disposition, increased susceptibility to certain heart conditions and other medical conditions and many others. Best to Google it for a very quick overview.
Generally speaking, a syndrome is a condition that has a specific array of symptoms. According to the Encyclopedia of Phobias, Fears, and Anxieties (Second Edition), a syndrome is "a group of symptoms that occur together that constitute a recognizable condition", and that "'syndrome' is less specific than 'disorder' or 'disease', which generally imply a specific cause or disease process".
Disorders, such as Down's Syndrome, are caused by nondisjunction.
Mistakes in meiosis may cause Down syndrome. The error happens when the chromosomes segregate into the gametes. The egg or sperm may have too many or too few chromosomes. Down syndrome has an extra chromosome in the 21st pair.
can not be passed from generation to generation
trisomy There several types of trisomy, the most well known is probably Down syndrome, which is trisomy 21.
The cause of Down Syndrome was discovered in 1958 by Jérôme Lejeune.
It can be.
No, there's no cure, but there are treatments to control the symptoms.
No. Down is caused by an extra chromosome while Marfan is due to a mutation in one or more genes.
No.
yes it causes childlike symptoms
Down syndrome is a genetic defect and is the result of an extra chromosome at the time of conception. The use of Procardia (or any other drug) does not cause Down syndrome.
According to Columbia Encyclopedia, the symptoms of Down syndrome were "first described in 1866 by an English physician, J. Langdon Down." Down syndrome - albeit without this particularly moniker - has been known for many hundreds, if not thousands, of years. It was usually called Mongolism in recent centuries in the UK. Dr. John Langdon Down was the one who did much research on the subject, and the symptoms described by him have been renamed "Down syndrome." To read more about Down syndrome on Answers.com, click on the Related Link.
the genetic conditions
the genetic conditions
yes
Down syndrome is not caused by a bacterial infection therefore the answer to your question is no. Down syndrome is caused by an extra chromosome in the cell nucleus.