what happens down syndrome ?

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https://www.mayoclinic.org › diseases-conditions › down-syndrome › symptoms-causes › syc-20355977

https://www.mayoclinic.org › diseases-conditions › down-syndrome › symptoms-causes › syc-20355977
Down syndrome – Symptoms and causes – Mayo Clinic
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.

https://my.clevelandclinic.org › health › diseases › 17818-down-syndrome

https://my.clevelandclinic.org › health › diseases › 17818-down-syndrome
Down Syndrome: Symptoms & Causes – Cleveland Clinic
Overview Down syndrome can affect how your child develops. Physical signs become more apparent as your child grows. What is Down syndrome? Down syndrome is a genetic condition where people are born with an extra chromosome. Most people have 23 pairs of chromosomes within each cell in their body, for a total of 46.

https://www.cdc.gov › ncbddd › birthdefects › downsyndrome.html

https://www.cdc.gov › ncbddd › birthdefects › downsyndrome.html
Facts about Down Syndrome | CDC
10 oct. 2023Print Down syndrome is a condition in which a person has an extra chromosome. What is Down Syndrome? 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.

https://www.genome.gov › Genetic-Disorders › Down-Syndrome

https://www.genome.gov › Genetic-Disorders › Down-Syndrome
About Down Syndrome – National Human Genome Research Institute
For Patients and Families Genetic Disorders About Down Syndrome About Down Syndrome Down syndrome is a chromosomal condition related to chromosome 21. It affects 1 in 800 to 1 in 1000 live born infants. What are the symptoms of Down syndrome?

https://www.webmd.com › children › understanding-down-syndrome-basics

https://www.webmd.com › children › understanding-down-syndrome-basics
Down Syndrome: Causes, Symptoms, Diagnosis, & Treatment – WebMD
5 min read What Is Down Syndrome? Down syndrome is a genetic condition that causes mild to serious physical and developmental problems. People with Down syndrome are born with an extra…

https://www.verywellhealth.com › symptoms-of-down-syndrome-1120463

https://www.verywellhealth.com › symptoms-of-down-syndrome-1120463
Symptoms and Characteristics of Down Syndrome – Verywell Health
Il y a 6 joursTrisomy 21: In this type of Down syndrome, each cell in the body has three separate copies of chromosome 21 instead of the usual 2 copies. About 95% of people with Down syndrome have this type. Translocation Down syndrome: This occurs when an extra part or a whole extra chromosome 21 is present, but it is attached to a different chromosome (trans-located) rather than being a separate …

https://www.healthline.com › health › down-syndrome

https://www.healthline.com › health › down-syndrome
Down Syndrome: Causes, Types, and Symptoms – Healthline
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…

https://www.khanacademy.org › science › health-and-medicine › executive-systems-of-the-brain › neurodevelopmental-disorders › a › what-is-down-syndrome

https://www.khanacademy.org › science › health-and-medicine › executive-systems-of-the-brain › neurodevelopmental-disorders › a › what-is-down-syndrome
What is Down syndrome? (article) | Khan Academy
Down syndrome is a chromosomal (related to your DNA) disorder in which atypical cell division causes an extra portion of chromosome 21 to be present in some or all of a person’s cells. Where do our chromosomes come from? Chromosomes are the tightly wound strands of genetic material that contain all of your DNA.

https://medlineplus.gov › genetics › condition › down-syndrome

https://medlineplus.gov › genetics › condition › down-syndrome
Down syndrome: MedlinePlus Genetics
Down syndrome is a chromosomal condition that is associated with intellectual disability, a characteristic facial appearance, and weak muscle tone (hypotonia) in infancy. All affected individuals experience cognitive delays, but the intellectual disability is usually mild to moderate. People with often have a characteristic facial …

https://www.stanfordchildrens.org › en › topic › default?id=down-syndrome-trisomy-21-90-P02356

https://www.stanfordchildrens.org › en › topic › default?id=down-syndrome-trisomy-21-90-P02356
Down Syndrome (Trisomy 21) in Children – Stanford Medicine Children’s …
Down syndrome is a genetic disorder. It is also called trisomy 21. It includes certain birth defects, learning problems, and facial features. A child with Down syndrome also may have heart defects and problems with vision and hearing. How severe or mild these problems are varies from child to child. is one of the most common … lesoutrali bot