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.
any structural anomaly of either of the two (anterior and posterior) limbs of the stapes that pass from the head to the base or footplate; in mice, the anterior crus is curved and the posterior crus is more straight whereas in humans, the anterior crus is more straight than the posterior crus