On Evolution

accept adapted aeroplane alleles amino acid analogies animals argument arise arrangement of microchaetes asexual assumption behaviour biological breeding bristles C. H. Waddington cells chromosome complexity Darwinism depends develop difficulty discussed Drosophila dysgenic eggs ensure environment equilibrium evolution theory evolutionary change evolved example exist explain favour females fertilization figure Fisher game theory gene frequency genetic recombination genetically determined genotype group selection haemoglobin heredity hermaphrodites heterosis heterozygotes human ideas increase individual selection J. B. S. Haldane kin selection locus macrochaetes male Maynard Smith measures mechanisms Mendelian molecular molecule natural selection neo-Darwinism neutral mutation neutral mutation theory normal number of structures occur ocelli ocelli-less offspring opponent organisms P'ab particular pattern phenotype polymorphism population possible predict prepattern probability problem produce proteins reason ritualized conflicts seems selective advantage selectively neutral sex ratio sexual reproduction species sperm stable strategy suggested suppose survival tion transformationist eugenics variation wild-type