Fig. 7
From: Sex without crossing over in the yeast Saccharomycodes ludwigii
High rates of intratetrad mating coupled with suppression of meiotic recombination maximize preservation of heterozygosity. a Non-sister intratetrad mating with crossing over in meiosis I. The mating-type locus is linked to the centromere of its chromosome (which is often observed in species that engage in intratetrad mating, e.g., S. cerevisiae and Sd. ludwigii). b Non-sister intratetrad mating with achiasmate meiosis I, which normally happens in Sd. ludwigii