2 hours agoIs Down heir syndrome?
Periskopi(8 years ago)
(8 years ago)Down syndrome is one of the frequent genetic abnormalities facing the east. This syndrome was described for the first time in 1866 by John Langdon Down, but until 1959, when the defect was first discovered in chromosome 21, so abnormal division of chromosome 21 cells was the cause of this syndrome [...]
Down syndrome is one of the frequent genetic abnormalities facing the east. This syndrome was described for the first time in 1866 by John Langdon Down, but until 1959, when the defect was first discovered in chromosome 21, so abnormal division of chromosome 21 cells was unknown.
People with Down syndrome have 47 chromosomes in each cell instead of 46. This extra chromosome, in part or completely chromosome 21, results in characteristics associated with syndrome.
Is it a legacy?
Usually Down syndrome is not inherited. It was caused by an error in cell sharing during the early development of the fetus, writes Mayo Clinic.
Down transmission section can go from parents to children. Yet, only about 3 to 4 percent of children with Doa syndrome have transplantation, and only a few have inherited it from one of their parents.
This means that he or she has no signs or symptoms of Down syndrome, but it can pass an unbalanized transplant on children, causing Down syndrome to children. /Periscopi/
