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Down syndrome happens by the splitting of the chromosomes. It is not a genetic disease. It is a chromosomaldisorder.
Chromosomal changes like duplications or translocations1 occur in only one sex cell. A baby normally inherits 23 chromosomes from each parent to make a total of 46 chromosomes in 23 identifiable pairs.
In Down Syndrome, an extra (duplicated) chromosome number 21 is inherited from either the father or the mother, to make a total of 47 chromosomes (23 pairs plus 1) in every cell of the DS child. (DS is also called Trisomy 21 ) DS is usually inherited from the mother, and the major risk of DS is the age of the woman at conception.
1A duplication is an extra copy of a chromosome (or part of a chromosome) - a translocation is an extra bit of chromosome sticking onto another chromosome.
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoDown Syndrome (Not 'Down's') occurs when a gene has the wrong number of alleles. There are many such birth defects that never show up because your body has a large tolerance for small differences. Not so in Down Syndrome, though.
Down syndrome occurs anywhere, and is more prevalent the older a woman is when she gets pregnant.
Wiki User
∙ 14y agoIn 5% of Down syndrome cases, a translocation that occurred in previous generations between Chromosome 21 and 14 is the cause.
Wiki User
∙ 12y agoOne of the times a mutation causing down syndrome can occur is during meiosis, when the ovum becomes a zygote. Sorry I don't know more.
schockemma
Down syndrome is caused by nondisjuntion which is an issue faced during cell division. A person with down syndrome ends up having 3 copies of chromosome 21 instead of 2.
Wiki User
∙ 13y agoan extra copy of chromosome 11
Wiki User
∙ 8y agoAn extra 21 chromosome.
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Is anyone susceptible to this Down syndrome?
no, it is a chromosomal abnormality, not a contagious disease.
What is the most common chromosomal abnormality in humans?
The most common chromosomal abnormality in humans is Down syndrome, which is caused by an extra copy of chromosome 21. It occurs in about 1 in 700 births.
What gene is affected in Down Syndrome?
It is the result of a chromosomal abnormality, in which there is an extra chromsome on the chromosome 21 pair. This is call trisomy 21.
What is meant by chromosomal abnormality?
A chromosomal abnormality refers to any alterations in the number, structure, or arrangement of chromosomes in a cell. These abnormalities can result in genetic disorders or birth defects, affecting an individual's development and overall health. Common examples include Down syndrome, Turner syndrome, and Klinefelter syndrome.
Which type of chromosomal abnormalities is most likely to be viable in humans?
Trisomy 21 (Down syndrome) is the most common type of chromosomal abnormality that is viable in humans. Individuals with Down syndrome have an extra copy of chromosome 21, which can result in distinctive physical characteristics and developmental delays, but many individuals with Down syndrome lead healthy and fulfilling lives.
Why do people call Down Syndrome Down's?
Down syndrome is the correct term. People who are using "Downs" are speaking incorrectly. Down syndrome used to be called Down's syndrome, but since John Langdon Down did not have nor "invent" this chromosomal abnormality, the correct name is Down syndrome. Countries such as the UK, still use the term Down's syndrome, but shortening it to Down's is not using people first language, therefore, it is incorrect.
How do you get Down syndrome?
You do not "get" Down's syndrome. You are born with it. It is a chromosomal condition of the 21st chromosome.
What are the chromosomal aberrations of Down syndrome?
There is no actual chromosomal change, there is an extra chromosome.
Is down syndrome communicable disease?
No. Down's syndrome is a chromosomal disorder. In order to have it you have to be born with it.
What is the most common chromosomal abnormality seen in live born babies what is the prevalence of this disorder what is the relationship between maternal age and the risk of having a baby with this?
Down Syndrome-the rest is on wikipedia
What are the Effects of chromosomal abnormality in cognitive development of a person?
Chromosomal abnormalities can lead to intellectual disabilities, learning delays, and developmental disorders that may impact cognitive development. Conditions like Down syndrome, Turner syndrome, and Klinefelter syndrome are examples of chromosomal abnormalities that can affect cognitive functioning in different ways, depending on the specific genetic changes involved. Early intervention and individualized support can help mitigate these challenges and optimize cognitive development.
What could be described as a chromosomal mutation?
Chromosomal mutation can have lasting impacts on the person who this happens to. A version of a chromosomal mutation is the mutation that leads to Down's Syndrome.
