17 июн. 2021 г. · Down syndrome is a genetic condition caused by the presence of an extra chromosome 21. It causes delays in physical and intellectual ... |
16 февр. 2019 г. · Down syndrome (DS) is a genetic condition caused by an extra chromosome 21. It causes delays in physical and intellectual development. |
Neurodevelopmental syndrome named for John Langdon Haydon Down who first described the physical and behavioral characteristics in 1862. Down Syndrome. 1958 ... |
A genetic disorder that causes delays in physical and intellectual development. Copyright © Texas Education Agency, 2017. All rights reserved. 4. Causes of Down ... |
27 нояб. 2014 г. · CausesTrisomy 21 In most cases, approximately 92-95% of the time, Down syndrome is caused by the presence of an extra chromosome 21 in all cells ... |
Down Syndrome is a genetic condition caused by the presence of an extra chromosome 21. It occurs in approximately 1 in 800-1200 live births. |
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