Mutation affecting cell separation and macronuclear resorption during conjugation in Tetrahymena thermophila: early expression of the zygotic genotype.


A new recessive conjugation lethal mutation was found in Tetrahymena thermophila which was named mra for macronuclear resorption arrest. Other events affected by the mra mutations are separation of pairs, DNA replication in the macronuclear anlagen, and resorption of one of the two micronuclei. In wild-type crosses 50% of the pairs had separated by 12 hr… (More)


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