These are cases of mosaicism, in which cells of differing karyotypes ... in the size range of chromosome pairs 6 to 12 plus X, indicating the presence of 1 X chromosome. In the size range of ...

If humans had an X-linked biallelic coat color gene, as cats do, then female mosaicism would be as evident in humans as it is in calico cats. This outcome of X inactivation is not immediately ...

4 showed XO/X-iso X mosaicism, 1 showed an XO and an X/-deleted X stem, and in 2 mosaicism was presumptive. None of the chromatin-negative patients showed clinical Hashimoto thyroiditis or goiter.

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?

The findings “highlight that mosaicism may be more common than we had appreciated so far,” geneticist Anne Goriely of the University of Oxford wrote in an e-mail to The Scientist. “The main value of ...