Introduction: Trisomy conditions

Trisomy conditions: Trisomy conditions are chromosome conditions where the disease results from an extra chromosome. Normal humans have two copies of the non-sex chromosomes 1..22, and disease arises if a fetus wrongly gets a third copy of any of these chromosomes.

See also articles Introduction to Genetics, Introduction to Chromosome Diseases, and Introduction to Genetic Diseases.

Conditions list: The list of conditions in the Trisomy conditions group includes:

• Down Syndrome
• Edwards Syndrome
• Patau syndrome
• Trisomy 22
• Cri-du-chat syndrome

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