Theoretically it was thought that one of the main advantages of sexual populations was that it would purge the amount on non-synonymous mutations (Kn) by meiotic and recombinational reshuffling of genes.
This was tested by Paland & Lynch by using sexual and asexual forms of the water flea Daphnia pulex. They compared mitochondrial genes of the two forms for ratios of synonymous and non-synonymous nucleotide substitutions (Kn/Ks). If everything fitted into the theoretical framework, Kn/Ks should be much higher in asexual populations than in sexual ones…. And the results backed up the hypothesis: 17.7% of amino-acid substitutions arising in asexual lineages persist despite being deleterious, just 4.4% in sexual lineages.
So, another advantage for being sexual… some people should learn