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OpenStudy (anonymous):
Could there be a 24th chromosome in the human body?
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OpenStudy (anonymous):
Nope, there are only 23 pairs of chromosomes. But I'm not very sure, that might happen due to genetic disorders.
OpenStudy (anonymous):
There are examples of extra chromosomes as pratu043 suggests - Down's syndrome occurs when 3 copies of chromosome 21 are present in the embryo (and hence in all the cells of the adult). This is known as trisomy 21. Other conditions include extra sex chromosomes - people can be XXY or XYY as a result of a genetic abnormality.
OpenStudy (anonymous):
it can turnes as well in which ther is deficiency of 1chromosome
OpenStudy (anonymous):
The geek is right - individuals with Turner's syndrome have only one X chromosome.
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