In 1910, morgan did a series of experiments with the fruit fly drosophila, an organism where females are xx and males are xy. when a mutant male fly with white eyes was crossed with a wild type female with red eyes, none of the f1 progeny had white eyes but 18% of the f2 progeny had white eyes. unexpectedly, all of these white-eyed f2 flies were males. based on these results, morgan concluded that white eyes is caused by a recessive x-linked allele. suppose morgan had found that half of the f1 progeny had white eyes but all of these white-eyed f1 flies were females. in this case, a valid hypothesis would be?