trisomy
There several types of trisomy, the most well known is probably Down syndrome, which is trisomy 21.
An extra chromosome 18 (trisomy 18) causes mental retardation.
Down Syndrome
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.
Cells have 42 chromosomes, reproductive cells have 21. An extra chromosome is usually the cause of genetic defects.
Fragile X Syndrome
Down syndrome is a chromosomal disorder. It is caused by having 1 extra chromosome (chromosome 21).
No, Down's syndrome is only a human genetic disorder. Those with the disorder have an extra chromosome. Raccoons do not get this particular genetic disorder.
an error in meiotic cell division
Fragile X Syndrome
Fragile X Syndrome
Fragile X Syndrome
Fragile X Syndrome
Klinefelter Syndrome is sex-linked, because it is a genetic defect that results in a male having an extra X chromosome.
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.
A genetic disorder caused by the presence of all or part of a third copy of chromosome 21.
Angelman syndrome is a genetic disorder, as is Down syndrome. But they are not the same. Angelman Syndrome involves a deletion of Chromosome 15, whereas people with Down syndrome have an extra copy of Chromosome 21.