The "balance" argument and the evolution of sex.
D000818:Animals; D001042:Aphids; D005075:Biological Evolution; D004171:Diploidy; D005260:Female; D006238:Haploidy; D007178:Inbreeding; D008297:Male; D008954:Models, Biological; D009154:Mutation; D010312:Parthenogenesis; D012100:Reproduction, Asexual; D012403:Rotifera; D012641:Selection, Genetic; D012723:Sex