THE GENETIC INTEGRITY OF UPGRADED AND DOWNGRADED ALLELES OF THE MELEZITOSE LOCUS IN SACCHAROMYCES

Abstract
Genetic analysis, involving 2 generations (33 tetrads) of hybrids between the partial mutant TMsgz and a tmsgz culture, established the integrity of the downgraded allele TMSGZ. The integrity of the upgraded allele, TMSGZ was maintained in hybrids with tmsgz cultures for 3 generations (74 tetrads).