The development of laterality.
Experimental data, primarily from experiments with Drosophila, and observational data, primarily from human beings, are presented to show if their is a genetic basis for laterality. The evidence was found to be inconclusive. It is proposed that there for three etiologies of lefthandedness in human beings: pathological, natural, and learned.
D000818:Animals; D004331:Drosophila melanogaster; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D010641:Phenotype; D012737:Sex Factors