Conjugation in Tetrahymena

Abstract
The use of animal cells for biochemical genetic studies has been retarded by the difficulty of maintaining animals in a defined medium. The ciliate Tetrahymena has been so kept, and will conjugate soon after the nutrient medium has been exhausted. However, conjugation within a clone leads to the death of the conjugants. Strains have been kept in the lab. since 1936 without micronuclei; such animals do not conjugate.

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