title: Transitory Heterosis in Numbers of Basal Bodies in TETRAHYMENA PYRIFORMIS.
abstract: The numbers of kinetosomes in ciliary rows on the ventral surface of cells of Tetrahymena pyriformis, syngen 1, are greater by about 10% in young heterozygotes established by crossing two inbred strains than in either homozygote. The difference, apparent at 20 fissions post-fertilization, is essentially gone by 100 fissions. This observation is consistent with a generalized "allelic exclusion" at all loci completed by perhaps 60 fissions after fertilization.
authors.affiliation: Zoology Department, University of Illinois, Urbana, Illinois 61801.
authors.forename: D L
authors.initials: DL
authors.lastname: Nanney
authors.forename: F P
authors.initials: FP
authors.lastname: Doerder