Mating Type Determination in Tetrahymena Pyriformis
نویسندگان
چکیده
منابع مشابه
Mating Type Determination in Variety 8, Tetrahymena Pyriformis.
WO major kinds of mechanisms controlling the expression of hereditary Tmating type specificities have been described among the ciliates. In Euplotes patella (KIMBALL 1942; POWERS 1943; SONNEBORN 1947), Euplotes uannus ( HECKMANN 1961 j and Paramecium bursaria ( JENNINGS 1942; SIEGEL and LARISON 1960; SIEGEL 1963) , mating types are inherited as if uniquely controlled by simple Mendelian differe...
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The classical Golgi apparatus has not been observed in the several strains of Tetrahymena pyriformis examined in this laboratory at the ultrastructural level when the ciliates are grown vegetatively. However, sexually active strains, when starved for the purpose of inducing conjugation, contain stacked saccules in the oral region. When such opposite mating types are mixed for mating, the stacke...
متن کاملMating Type Determination in Tetrahymena: Last Man Standing
Tetrahymena, a single-celled protist, is a eukaryote, just like you and me. But that’s about where the similarity ends. Each Tetrahymena cell contains not one, but two nuclei. The diploid germline nucleus remains transcriptionally silent throughout asexual reproduction, while the somatic nucleus is transcriptionally active. Most especially, Tetrahymena do sex differently from us—there are not t...
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ATING type inheritance in a cililate follows one of two basic patterns (SONNEBORN 1947; BEALE 1954; KIMBALL 1964; NANNEY 1968). In ciliates with genic inheritance mating types are controlled directly by one or more genes. In ciliates with epigenetic inheritance an array of mating type potentialities is controlled by nuclear genes, but which mating type is actually expressed by a given cell is d...
متن کاملRibosome Synthesis in Tetrahymena Pyriformis
The cellular site of synthesis of ribosomal RNA in Tetrahymena pyriformis was studied by analyzing the purified nuclear and cytoplasmic RNA from cells pulse labeled with uridine-(3)H. The results of studies using zonal centrifugation in sucrose density gradients show that the ribosomal RNA is synthesized in the nucleus as a large precursor molecule sedimenting at 35S. The 35S molecule undergoes...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1953
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.39.10.1057