GENETIC FACTORS AFFECTING MATING TYPE FREQUENCIES IN VARIETY 1 OF 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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homozygotes. Moreover, all wild types studied so far have been heterozygotes and both homozygotes. +/+ and p/p, produced in breeding experiments show low viability. In addition, in all crosses where the end results were homozygotes and heterozygotes, the ratios are always skewed toward the latter. This investigation seems to support the thesis that in populations of T . pyriformis an outbreedin...
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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...
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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...
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Fourteen nitrosoguanidine-induced mutations that bring about temperature-sensitive morphological abnormalities resulting from a specific effect on cell division have been isolated as heterozygous phenotypic assortants in Tetrahymena pyriformis syngen 1. Genetic analysis revealed all to be single-gene recessives. Detailed analysis of the kinetics of assortment for one of the mutated alleles reve...
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ژورنال
عنوان ژورنال: Genetics
سال: 1959
ISSN: 1943-2631
DOI: 10.1093/genetics/44.6.1173