trisomy
There several types of trisomy, the most well known is probably Down syndrome, which is trisomy 21.
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An extra chromosome can cause genetic disorders such as Down syndrome, which is caused by an extra copy of chromosome 21. This leads to developmental delays, intellectual disabilities, and certain physical characteristics.
Fragile X Syndrome
Fragile X Syndrome
If someone has an extra chromosome it means there was a genetic mutation that is abnormal in human development. It may result in problems with the person affecting them on a basic level, or may go fully unnoticed. A common disorder that can be caused by having an extra chromosome is Down's Syndrome.
Chromosomal, because the person with Klinefelter's would have 47 chromosomes. A genetic disorder would be any disorder having to do with genes, but would not necessarily mean having an extra chromosome.
Chromosomal additions occur when an extra piece of a chromosome is added. This can lead to genetic abnormalities and developmental disorders in individuals. The extra genetic material can disrupt the normal function of genes on the affected chromosome.