A researcher is studying a single duck gene with two alleles, B and b. She samples ducks from five populations, each of which appears isolated and tends to stay near a unique body of water. Using the Hardy-Weinberg law, the researcher predicts that she will observe 100 ducks with the b/b genotype out of all of the ducks she samples. However, she is surprised to find that 220 ducks demonstrate the b/bgenotype. This is likely due to _____ in the duck species.a. positive assortativeb. disassortative matingc. population structured. negative assortative mating

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