By the age of 70, about 40% of men have lost the Y chromosome in at least some of their white blood cells. This condition, ...

Scientists at the USC Leonard Davis School of Gerontology have discovered a key connection between high levels of iron in the ...

The degree of overt mosaicism is not necessarily consistent with the amount of genetic dissimilarity. Some mosaics that show no obvious cellular variance may be distinguished by chromosome ...

Researchers mapped Y chromosome loss across thousands of individual cells from human cancers, with disturbing results.

A case of chromosomal mosaicism with cell types carrying sex-chromosome constitutions XYY and XO, composing cells grown from peripheral blood and skin respectively, is described.

In vertebrate retinas, specialized photoreceptors responsible for color vision (cone cells) arrange themselves in patterns ...

Mosaic Down Syndrome is a genetic condition in which a person is born with an extra copy of chromosome 21 in some cells, affecting less than 1% of those with Down syndrome.

In a nutshell Female cells randomly use either the maternal or paternal X chromosome—this study shows that relying more heavily on mom’s X chromosome could speed up brain aging and memory decline The ...

Reporting on their findings in Nature, “ The maternal X chromosome affects cognition and brain aging in female mice,” co-senior author Dubal and colleagues concluded, “Understanding how X m ...

Female mammals typically carry two X chromosomes — one from each parent — and a new study suggests that the maternal X is linked to faster brain aging.

Mosaicism develops when cells within the same person are genetically different. Find out what causes these differences, how it may affect you, and more.