During either of these processes the micronuclei of the cell ( s ) undergo meiosis, the old macronucleus disintegrates and a new macronucleus is formed by replication of the micronuclear DNA that had recently undergone meiosis.
42.
The body is ovoid to elongate, and uniformly ciliated, with a single macronucleus and a partial hypostomial frange ( " synhymenium " ) running from the left side of the cell to the oral aperture.
43.
In 2012, following a comprehensive review of the dileptid group, it was moved to the genus " Pseudomonilicaryon ", which is distinguished from " Dileptus " by the shape of its macronucleus.
44.
The micronucleus genome contains five chromosomes that undergo mitosis during micronuclear division and meiosis during life cycle during conjugation, allowing it to be site-specific, and a new macronucleus differentiates from a mitotic descendant of the conjugated micronucleus.
45.
During development of the macronucleus, IESs are deleted and the remaining gene segments, Macronuclear Destined Sequences ( MDSs ), are spliced together to give the operational gene . " Tetrahymena " has about 6000 IESs and about 15 % of micronuclear DNA is eliminated during this process.
46.
As a ciliated protozoan, " "'Tetrahymena thermophila " "'exhibits nuclear dimorphism : two types of cell non-germline macronucleus and a small, germline micronucleus in each cell at the same time and they both carry out different functions with distinct cytological and biological properties.
47.
Unlike some other ciliates, " C . uncinata " contains millions of minichromosomes ( somatic chromosomes ) in its macronucleus while its micronucleus is estimated to contain 3 chromosomes . " Childonella uncinata " is the causative agent of Chilodonelloza, a disease that affects the gills and skin of fresh water fish, and may act as a facilitative parasite of mosquito larva.
