A chromosome abnormality, disorder, anomaly, aberration, or mutation is a missing, extra, or irregular portion of chromosomal DNA.
Consequently, what are common chromosomal abnormalities?
Some of the most common chromosomal abnormalities include: Down's syndrome or trisomy 21. Edward's syndrome or trisomy 18. Patau syndrome or trisomy 13.
What is the most common chromosomal abnormality?
Aneuploidy refers to the presence of an extra chromosome or a missing chromosome and is the most common form of chromosomal abnormality. In the case of Down's syndrome or Trisomy 21, there is an additional copy of chromosome 21 and therefore 47 chromosomes.
What are the signs and symptoms of chromosomal abnormalities?
Possible symptoms of these disorders may include both mild and severe levels of mental retardation, heart and circulatory issues, and cleft palates. Other symptoms may include seizures and learning disabilities. Some chromosomal disorders are fatal and cause early miscarriages or infant death.