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Glossary Term
Glossary Term Mosaic
Definition An individual consisting of cells of two or more genotypes. One example is that of a normal female mammal heterozygous for different alleles of X-chromosome genes; because of the process of X-inactivation, such females consist of two cell types, each with a different X chromosome inactivated. This is an unusual example because there is no actual difference in genotype between the two cell types, but rather there is an epigenetic difference.

Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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last database update
MGI 6.22
The Jackson Laboratory