  It has recently been suggested that the fundamental haploid-diploid cycle of
eukaryotic sex exploits a rudimentary form of the Baldwin effect. Thereafter
the other associated phenomena can be explained as evolution tuning the amount
and frequency of learning experienced by an organism. Using the well-known NK
model of fitness landscapes it is here shown that the emergence of sex
determination systems can also be explained under this view of eukaryotic
evolution.
