Although the main causative aspect for Down syndrome is genetic, a number of findings suggest that some other factors may also be contributory to the development of the abnormality. It is vital to know about these to stay safe. Early detection and consistency in the prevention and treatment approaches can help a lot in alleviating the problem.
About Types and Causes
Normal human cells have 23 pairs of chromosomes. A chromosome in every pair stems from the father, while the other comes from the mother. There are 3 types of abnormal cell division that involves he 21st chromosome. The cause of Down syndrome is considered to be one of the three types. All three abnormal divisions lead to the extra genetic material from chromosome 21, which is functional for the unique features and developmental problems that is Down syndrome.
In the case of Trisomy 21, the condition is caused by abnormal cell division that occurs while the sperm cell or egg cell is still developing. Patients with trisomy 21 have 3 copies of the chromosome 21 instead of the regular 2. The Mosaic type is rare, caused by the abnormal cell division after fertilization. Kids in this case, have...
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