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Types of Trisomy: Causes and Symptoms - Verywell Health
Jan 21, 2024 · Edwards Syndrome (Trisomy 18) Edwards syndrome (trisomy 18) is usually caused by an extra chromosome 18. Only around 5% of cases are due to translocation. Edwards syndrome is characterized by low birth weight, an abnormally small head, and heart, kidney, and lung defects. While a few children with Edwards syndrome survive to adolescence, the ...
Trisomy | Description, Cause, & Examples | Britannica
trisomy, abnormality in chromosome number (aneuploidy), characterized by the existence of an extra chromosome, resulting in three copies of the affected chromosome, rather than the typical two copies. As a result, individuals with a trisomy disorder carry 47 chromosomes, instead of the normal 46. Trisomy can affect some or all cells in the body ...
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