While Emma has Down syndrome — specifically a rare type called Mosaic Down syndrome — some people don’t believe it. “At the ...

It is a genetic condition caused when an unusual cell division result in an extra full or even partial copy of chromosome 21. This extra genetic material causes the developmental changes and physical ...

A century after Down syndrome was first described, scientists discovered that the root cause of this disorder is a condition called trisomy 21 ... chromosome, usually chromosome 14 or 15.

Some have the usual 46 chromosomes and some have 47, which are the ones with the extra chromosome 21 that defines trisomy 21. Although this can cause babies born with mosaic Down syndrome to have ...

The presence of three copies of chromosome 21, which harbors the amyloid precursor ... AD and associated neuropathologies have also been reported in individuals with trisomy 21 mosaicism. A man with ...

Could two pieces of a stone mosaic ever be identical? Of course, the answer is no--and each stone’s variation subtly contributes value to the finished work. Why should your cells be any different?

Down syndrome is a common chromosomal disorder caused by an extra chromosome 21, leading to intellectual disabilities and ...

A third copy of chromosome 21 exists with Down syndrome, which results in 47 chromosomes overall. Dr. Khanna explains that Trisomy 21 stands as the primary ... present two rare variations of the ...