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Why is having an extra chromosome a problem 2024?
Questioner：Emma Foster 2023-04-20 18:38:09
The most authoritative answer in 2024
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Harper Lee——Studied at the University of Tokyo, Lives in Tokyo, Japan.
Down syndrome is a common genetic cause of mental retardation. It is caused by an extra chromosome 21, which has hundreds of genes. Scientists are actively trying to find which specific genes are responsible for the disease. ... In Down syndrome, cells have 3 copies of some or all of the genes on the 21st chromosome.read more >>+119962023-04-25 18:38:09
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