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

Medically reviewed by Brigid Dwyer, MD Mosaic Down syndrome is a variant of Down syndrome. Down syndrome is a congenital ...

It is a genetic condition caused when an unusual cell division result in an extra full or even partial copy of chromosome 21.

Their team zeroed in on mosaic loss of Y chromosome (mLOY), a condition where some of a male’s somatic cells, particularly white blood cells, lose the Y chromosome. This condition, which is heavily ...

Three of eight females with gonadal dysgenesis and chromosomal mosaicism were found to have deleted Y chromosomes as the basis for this mosaicism. One of the five females with 46,XY gonadal ...

and the tissues in the body are a mosaic of both types. Why autoimmune disease is more common in women: X chromosome holds clues In theory, female and male cells both have an X chromosome that is ...