The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories (ftp://ftp.informatics.jax.org/pub/reports/index.html). For more information about these ontologies, see the MGI Publications Page at http://www.informatics.jax.org/mgihome/other/publications.shtml.
anomaly in the probability that whole chromosomes or pieces of chromosomes are gained or lost during cell division, resulting in an imbalance in the number of chromosomes per cell (aneuploidy) and an reduced rate of loss of heterozygosity