Why do humans virtually alone among all animal species display a distinct right-handedness? Not even our closest relatives among the apes posses such decided lateral asymmetry, as psychologists call it. Yet about 90 percent of every human population that has ever lived appears to have been right-handed. Professor Turner at Deakin University has studied the research literature on left-handedness and found that handedness goes with sidedness. So, nine out of ten people are right-handed and eight are right-footed. Research has shown that there is a genetic element to handedness. But, while left handedness tends to run in families, neither left nor right-handers will automatically produce off springs with the same-handedness.

MCQ: 220

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