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Mar 8, 2018 · This extra genetic material causes the developmental changes and physical features of Down syndrome. Down syndrome varies in severity among individuals, causing lifelong intellectual disability and developmental delays. It's the most common genetic chromosomal disorder and cause of learning disabilities in children.
Down syndrome or Down's syndrome, also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. It is usually associated with developmental delays, mild to moderate intellectual disability, and characteristic physical features.
Nov 28, 2023 · Down syndrome (sometimes called Down’s syndrome) is a condition in which a child is born with an extra copy of their 21st chromosome — hence its other name, trisomy 21.
Jan 31, 2023 · Down syndrome is a genetic condition where a person is born with an extra copy of chromosome 21. This means that they have a total of 47 chromosomes instead of 46. This can affect how their brain and body develop. People diagnosed with Down syndrome have happy and healthy lives with supportive care.
May 16, 2024 · Down syndrome is a genetic condition where a person is born with an extra chromosome. This can affect how their brain and body develop. People diagnosed with Down syndrome can lead healthy lives with supportive care. What it is. Down syndrome is a condition in which a person has an extra copy of chromosome 21.
Feb 23, 2024 · Down syndrome is a genetic condition that causes mild to significant physical and developmental problems. People with Down syndrome (DS) are born with an extra chromosome. Chromosomes are...
Apr 6, 2021 · Down syndrome occurs when an individual has a full or partial extra copy of chromosome 21. This additional genetic material alters the course of development and causes the characteristics associated with Down syndrome.
Aug 8, 2023 · Down syndrome (trisomy 21) is a genetic disorder caused by the presence of all or a portion of a third chromosome 21. Patients typically present with mild to moderate intellectual disability, growth retardation, and characteristic facial features.
People with Down syndrome have an extra number 21 chromosome in each cell, compared to other people. Down syndrome is named after Dr John Langdon Down who wrote about it in 1866. Down syndrome is sometimes called trisomy 21, because people with Down syndrome have three number 21 chromosomes.
Down's syndrome is when you're born with an extra chromosome. You usually get an extra chromosome by chance, because of a change in the sperm or egg before you're born. This change does not happen because of anything anyone did before or during pregnancy. What it's like to have Down's syndrome.
