Down syndrome - Symptoms and causes - Mayo Clinic
WEBMar 8, 2018 · Down syndrome is a genetic disorder caused when abnormal cell division results in an extra full or partial copy of chromosome 21. 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.
Down syndrome - Wikipedia
WEBDown 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. [3] . It is usually associated with developmental delays, mild to moderate intellectual disability, and characteristic physical features.
Downs | England, Map, & Facts | Britannica
WEBDowns, rounded and grass-covered hills in southern England that are typically composed of chalk. The name comes from the Old English dūn (“hill”). The main areas of chalk downs lie in Berkshire, Wiltshire, and northern Hampshire, with spurs running eastward into West Sussex, Surrey, and Kent.
Facts about Down Syndrome | CDC
WEB6 days ago · Down syndrome is a condition in which a person has an extra chromosome. Chromosomes are small “packages” of genes in the body. They determine how a baby’s body forms and functions as it grows during pregnancy and after birth. Typically, a baby is born with 46 chromosomes.
Down Syndrome: Causes, Types, and Symptoms - Healthline
WEBNov 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. This causes physical and...
Down Syndrome: Causes, Symptoms, Diagnosis, and Treatment - WebMD
WEBFeb 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...
Downs - Wikipedia
WEBAustralia. Europe. North America. Other. See also. Downs. Look up Downs or downs in Wiktionary, the free dictionary. Downland, Downs, or The Downs may refer to: Places. Topography. In the 'hill' context, the word 'down' derives from Celtic (Gaelic or Welsh) dun "hill, hill fort". Downland, a geographical feature. Australia.
Down Syndrome - StatPearls - NCBI Bookshelf - National Center …
WEBAug 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.
Down Syndrome: MedlinePlus
WEBJan 26, 2024 · Down syndrome is a condition in which a person has an extra chromosome or an extra piece of a chromosome. This extra copy changes how a baby's body and brain develop. It can cause both mental and physical challenges during their lifetime. Even though people with Down syndrome might act and look similar, each person has different abilities.
Down's syndrome - NHS
WEBHome. Health A to Z. What is Down's syndrome? Down's syndrome. What is Down's syndrome? Advice for new parents. How to help children and young people. Support for adults. Support for families and carers. Other health conditions. Down's syndrome is when you're born with an extra chromosome.
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