01304nas a2200121   4500008004100000245010000041210006900141300001200210490000700222520088400229100001901113856005001132       1975                        eng d00aA Single-Gene-Dependent Abnormality of Adoral Membranelles in Tetrahymena Pyriformis, Species 10 aSingleGeneDependent Abnormality of Adoral Membranelles in Tetrah  a631-6390 v813 a<p>Strain D of species (syngen) 1, <em>Tetrahymena pyriformis</em>, differs from other inbred strains in its manifestation of certain abnormal patterns of adoral membranelles. Instead of the usual three membranelles some cells have a greater number, most frequently 4 or 5, but occasionally up to 7. The extra membranelles, or even all membranelles of any given set, are shorter than M-1 and M-2 of the normal pattern. In other cases, the only alteration observed is a change in the relative lengths of the three membranelles. The frequency of abnormal cells varies from about 5% to 15% during exponential growth to over 50% after prolonged stationary culture. The genetic basis for the abnormality is shown to be due to a single recessive gene which segregates normally in various crosses and which manifests vegetative assortment as do most allelic variants in species 1.</p>
1 aKaczanowski, A  uhttps://ciliateguide.myspecies.info/node/3729