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12 lis 2024 · Down syndrome is a genetic condition caused when an unusual 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. The term "syndrome" refers to a set of symptoms that tend to happen together.
Down syndrome (also known by the karyotype 47,XX,+21 for females and 47,XY,+21 for males) [98] is mostly caused by a failure of the 21st chromosome to separate during egg or sperm development, known as nondisjunction. [91] As a result, a sperm or egg cell is produced with an extra copy of chromosome 21; this cell thus has 24 chromosomes.
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.
28 paź 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.
23 lut 2024 · Down syndrome is a genetic condition that causes mild to significant physical and developmental problems. People with Down syndrome have an extra copy of chromosome 21, which affects their mental and physical abilities, appearance, and health.
28 lis 2023 · Down syndrome is a genetic condition that causes physical and mental developmental delays and disabilities. It results from an extra copy of the 21st chromosome, and there are three types: trisomy 21, mosaicism, and translocation.
19 kwi 2023 · Down syndrome is a genetic condition that occurs when a person has an extra copy of chromosome 21. It can affect cognitive ability, physical growth, and health, and may have links to autism.
