In article <Pine.A188.8.131.521215181833.49688A-100000 at swan.uspnet.usp.br>,
fgdnobre at usp.br (Francisco G da Nobrega ib-bio 7588) wrote:
> Dear Sirs:
>> Could anyone comment on the possibility that a haploid strain like W303,
> spontaneously (heterothalic lab strain) switches mating type and, as a
> result, in old patches one may find diploid cells that could be induced
> to sporulate.
Highly unlikely. Spontaneous mating-type switching in heterothallic
strains is usually at mitotic recombination levels (i.e. <10e-6).
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