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Studies on the cytology of yeasts. VI. Lethal chromosomal mutations in yeasts



Studies on the cytology of yeasts. VI. Lethal chromosomal mutations in yeasts



Jour Indian Inst Sci 34(3): 235-251



Abnormal segregation of chromosomes in the hexaploid, pentaploid and triploid cells originating as a result of mitotic aberrations in a tetra-ploid distillery yeast are descr. The diploids transform themselves into tetraploids by somatic doubling. Cells with unbalanced chromosomal complements tend to produce the original tetraploid condition by irregular segregation of the unsplit chromosomes. Lagging of chromosomes, micronuclei formation and pycnosis are frequent in hexa- and pentaploids.

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