Genetics and Handedness In a study of left-handedness as a possible inherited trait, the data in the table below were obtained (based on data from “Why Are Some People Left-

Handed? An Evolutionary Perspective,” by Laurens and Faurie, Philosophical Transactions, Vol.

364). Use a 0.01 significance level to test the claim that left-handedness is independent of parental handedness. What do the results suggest about the inheritability of left-handedness?

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Parental Handedness Offspring Left-Handed? Father/Mother Yes No Right/Right 5360 50,928 Right/Left 767 2736 Left/Right 741 3667 Left/Left 94 289