Are there different forms of Down’s syndrome?

There are three different types of Down’s syndrome; these include:

  • Regular trisomy 21: this form affects around 94 percent of cases. Regular trisomy 21 Down’s syndrome occurs as a result of an additional 21st chromosome in each of the cells.
  • Translocation: translocation Down’s syndrome occurs as a result of the extra chromosome 21 attaching to another chromosome in the cell. Translocation Down’s syndrome can be passed down by a parent; however, they may have no symptoms of Down’s syndrome and may just be a carrier of the condition. Translocation accounts for around 4 percent of cases.
  • Mosaic: mosaic Down’s syndrome is the rarest form of the condition, affecting just 2 percent of people. Mosaic Down’s syndrome may produce milder symptoms; it occurs as a result of some cells having an additional chromosome 21 and other cells having the normal number of chromosomes.

FAQS Index : Down's Syndrome


FAQs Intro

  1. What is Down’s syndrome?
  2. Are there different forms of Down’s syndrome?
  3. What causes Down’s syndrome?
  4. Are there any risk factors?
  5. What are the symptoms of Down’s syndrome?
  1. What are the effects of Down’s syndrome?
  2. What treatments are available for Down’s syndrome?
  3. How common is Down’s syndrome?
  4. Is it possible to detect Down’s syndrome during pregnancy?
  5. Is there any help or support available for people with Down’s syndrome?

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