What role do genes other than chromosome 21 play in the features of Down syndrome?

The main cause of hospitalization was due to pneumonia in 50% of cases, followed by acute respiratory failure in 14%. Down syndrome is caused by an extra chromosome 21. Down syndrome affects people differently. It causes learning difficulties and health problems. Down syndrome, the most common genetic birth defect, is caused by the presence of an extra chromosome. Genes carry the “instructions” for every part of our ... Down syndrome is caused by an extra chromosome, but experts are not certain why this occurs or what factors may play a role. One factor experts do know about is ... Summary · Down syndrome is a common genetic condition caused by an extra chromosome 21. · Every person with Down syndrome is an individual. · People with Down ... Down syndrome – learn about symptoms, diagnosis, causes and treatments and how this disorder relates to Alzheimer's and other dementias. Nov 30, 2020 ... Basic studies to improve understanding of the genetic and biological causes of brain abnormalities that lead to Alzheimer's; Observational ... People with Down syndrome died about 28 years younger than the general population. Congenital heart anomalies, comorbidities, low birthweight, and Black and ... Down syndrome happens when a person is born with an extra chromosome. Chromosomes determine how a baby's body forms and functions. · What causes Down syndrome? Mar 27, 2023 ... There is no clear cause of the genetic condition, although maternal age is a major risk factor for Down syndrome. Women who become pregnant at ...