inactivation of recombination (HML)
The inactivation of recombination at sequences around a mating type donor locus, with the consequence that the other donor is the only one available for mating type switching; exemplified by the HML locus and surrounding sequences on Chromosome III in Saccharomyces cerevisiae.
GO:0007535
donor selection
is_a
GO:0045910
negative regulation of DNA recombination
is_a