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.
absence of the structure of the second arch which contributes to the development of the stapes, styloid process, hyoid bone, stylohyoid ligament, muscles of facial expression, stapedius muscle, stylohyoid muscle, and lining of the palatine tonsils