People with Down syndrome have an extra copy of chromosome 21, for a total of 47 chromosomes.
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People with Down syndrome have an extra copy of chromosome 21, for a total of 47 chromosomes. However, in a few cases of Down syndrome, 46 chromosomes are present. This total includes two normal-looking chromosomes 21, one normal chromosome 14, and a longer-than-normal chromosome 14. Interpret this observation. How can these individuals have 46 chromosomes?
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Most of chromosome 21 has been translocate...View the full answer
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Jehal Shah
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