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Chromosome 21 (Spanish: Cromosoma 21) is a Chilean crime thriller television series co-created by Matías Venables and Nico Martínez Bergen. [1] The series traces a police investigation into a young man with down syndrome involved in a murder. [2] [3] It had its original run on Chilean network Canal 13 on 14 October 2022.
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. [3] It is usually associated with developmental delays, mild to moderate intellectual disability, and characteristic physical features.
Down syndrome is a chromosomal abnormality characterized by the presence of an extra copy of genetic material on chromosome 21, either in whole ( trisomy 21) or part (such as due to translocations ). The effects of the extra copy varies greatly from individual to individual, depending on the extent of the extra copy, genetic background ...
In a small percentage of cases, Down syndrome is caused by a rearrangement of chromosomal material between chromosome 21 and another chromosome. As a result, a person has the usual two copies of chromosome 21, plus extra material from chromosome 21 attached to another chromosome.
Klinefelter syndrome. Klinefelter syndrome ( KS ), also known as 47,XXY, is a chromosome anomaly where a male has an extra X chromosome. [10] These complications commonly include infertility and small, poorly functioning testicles (if present).
Causes. Third copy of chromosome 13. Treatment. Supportive care. Prognosis. Poor. Named after. Klaus Patau. Patau syndrome is a syndrome caused by a chromosomal abnormality, in which some or all of the cells of the body contain extra genetic material from chromosome 13.
This is a list of people with Down syndrome, a condition also known as Down's syndrome or trisomy 21. Down syndrome is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [1]
The search for major genes that may be involved in Down syndrome symptoms is normally in the region 21q21–21q22.3. However, studies by Reeves et al. show that 41% of the genes on chromosome-21 have no functional purpose, and only 54% of functional genes have a known protein sequence.
World Down Syndrome Day ( WDSD) is marked each year on March 21, [1] beginning in 2007. The 21st day of March (the 3rd month of the year) was selected to signify the uniqueness of the triplication ( trisomy) of the 21st chromosome which causes Down syndrome.
After having one child with the condition, the risk of having a second is typically around one percent. [2] It is the second-most common condition due to a third chromosome at birth, after Down syndrome for a third chromosome 21. [4] Trisomy 18 occurs in around 1 in 5,000 live births. [3]