cy·to·ge·net·ics 
(sī′tō-jə-nĕtĭks)
(sī′tō-jə-nĕtĭks)n. (used with a sing. verb)
The branch of genetics that deals with the cellular components, particularly chromosomes, that are associated with heredity.
cy′to·ge·netic, cy′to·ge·neti·cal adj.
cy′to·ge·neti·cal·ly adv.
cy′to·ge·neti·cist (-sĭst) n.