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.

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.

Mosaic trisomy 8 is a rare genetic condition caused by an extra chromosome. Sometimes called trisomy 8 mosaicism, this condition develops well before birth.

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

This condition – known as mosaic loss of Y chromosome, or mLOY – is a major risk factor for heart failure and cardiac fibrosis in men growing older, according to the study, which includes ...

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 ...

This is called mosaic loss of Y chromosome in blood (mLOY). Hematopoietic mLOY is known to increase with age and tobacco use; it is detectable in 40% of 70-year-old men and 57% of 93-year-old men ...

Researchers report a novel mechanism for the origin of brain chromosomal mosaicism and link brain mosaic chromosome 1q gain to a distinct clinical phenotype.

Which chromosome, they did not say. A normal woman has 22 pairs of nonsex chromosomes, like a man, plus two x chromosomes to determine femaleness.

In mosaic Down syndrome, some of the person’s cells have three copies of chromosome 21, but some cells have two copies of this chromosome, resulting in a mixture. People with mosaic Down ...

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, ...