Suppose that left-handedness of a person is classified on the basis of one pair of genes, and suppose also that d represents a dominant gene and a g recessive gene. Thus, a person with dd genes is purely dominant, one with rr is purely recessive, and one with rd is hybrid. The purely dominant and the hybrid individuals are alike in appearance. Children receive 1 gene from each parent. If, with respect to a particular trait, 2 hybrid parents have a total of 3 children, what is the probability that 2 of the 3 children have the outward appearance of the dominant gene?