interACT Advocates 3 days ago
Kinds of chromosomes people can have: XX, XY, XO, XXY, XYY, XXYY, XXXY, XXXXY, XXX, XXXX, XXXXX, or mosaicism/chimerism (a mix of XX/XY, XY/XYY, XO/XX, etc.)
Many chromosomal variations are identified at birth or at some point throughout life. But some people would never know without testing.
add a skeleton here at some point