对纤毛虫中宿主-共生体系统的研究表明，双小核草履虫中卡巴粒的遗传为细胞质遗传理论提供了例证；
The study of the host-symbiont system in ciliates shows that : ( 1 ) The inheritance of kappa particles in the cytoplasm of Paramecium aurelia is a classic example of the cytoplasmic inheritance theory .
双小核草履虫