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Down's syndrome is a disorder caused by defective genes. It is most commonly caused by parents who are elderly at the time of birth.
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What human disease is caused by non-disjunction?
Down's syndrome is the most common.
Can celexa cause down syndrome?
No, down syndrome is caused by a genetic defect where there is an extra chromosome in most,if not all, of the cells of a body. it is not caused by a drug.
Is down syndrome more common in certain populations?
it is the most popler up your but
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 is the most common form of nerve entrapment?
The most common entrapment syndrome is carpal tunnel syndrome . Cubital tunnel syndrome of the ulnar nerve, which runs down the arm and through the elbow, also occurs frequently.
The Most common cause of excess blood cortisol?
cushing syndrome is the most common cause. other causes include adrenal tumor and ectopic adrenocorticotrophic hormone producing tumor
Is down syndrome most common with females?
Down Syndrome is spread fairly evenly between males and females. There does seem to be a slightly higher incidence among males, however.
Is down's syndrome inherited?
Most cases of down syndrome are not inherited. Translocation Down syndrome can be inherited.
How are cells of a person with Down syndrome different from those of a person without the disorder?
In Down syndrome, a person's cells have an extra copy of chromosome 21. In other words, instead of a pair of chromosomes, a person with Down syndrome has three of that chromosome. Down syndrome most often occurs when chromosomes fail to separate properly during meiosis. People with Down syndrome have a degree of mental retardation. Heart defects are also common, but can be treated.
How does down syndrome affect you intellectual?
Down syndrome is the most common genetic cause of learning disabilities in children. People with Down syndrome often have trouble remembering things they have learned and have no motivation to remember things that has no physical meaning to them. Down syndrome causes mild to severe mental retardation. Mental retardation is recognized as impaired learning, social, and vocational ability. This means that cognitive development is stunted. Children with Down syndrome often have to learn in special Ed classes, as normal classes may not be meeting the child's learning needs. Although individuals with Down syndrome can graduate high school, most will only have the IQ of an 8 year old. Another common problem with cognitive development for children with Down syndrome is the ability to generalize - to apply what they have learned in one a situation to another situation. Children with Down syndrome often have to be taught one thing multiply times. Short attention spans have been noted in children with Down syndrome.
What are two major causes responsible for Down syndrome?
Down syndrome is the most common genetic cause of ID (intellectual disability). Down syndrome is caused by trisomy for chromosome specifically, duplication of 21q22.95% of cases result from nondisjunction and resultant standard trisomy 21.The remaining 5% are relatively evenly split between robertsonian translocation, of which 14;21 translocation is most common and about half are familial.note :robertsonian translocation is a common form of chromosomal rearrangement that in humans occurs in the five acrocentric chromosome pairs, namely 13, 14, 15, 21, and 22.
How are the cells of a person with Down syndrome different from those of a person without Down syndrome?
In Down syndrome, a person's cells have an extra copy of chromosome 21. In other words, instead of a pair of chromosomes, a person with down syndrome has three of that chromosome. Down syndrome most often occurs when chromosomes fail to separate properly during meiosis. People with down syndrome have a degree of mental retardation. Heart defects are also common, but can be treated.
