| Dataset | MPO Gene-Phenotype Associations |
| Category | disease or phenotype associations |
| Type | phenotype |
| Description | absence of the ring-like, filamentous structure located at the midpiece-principal piece junction of the sperm flagellum, usually associated with a bent tail morphology (Mammalian Phenotype Ontology, MP_0009835) |
| External Link | http://www.informatics.jax.org/searches/Phat.cgi?id=MP:0009835 |
| Similar Terms | |
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2 gene mutations causing the absent sperm annulus phenotype in transgenic mice from the MPO Gene-Phenotype Associations dataset.
