you have found a recessive mutant fruit fly with no antennae. You interbreed this fly with its offspring and generate a true breeding mutant line of flies. A colleague later informs you that they have done the same thing. You borrow some of her antennaless flies, cross them to yours and in the F1 all of the flies are wild-type (have antennae). Which of the following is true? a) only one gene controls antennae development, and the parents of your cross each carry a different allele of that gene b) the two different antennaless alleles fail to complement each other c) each of the parents in your cross represents a mutation in a different gene that contributes to antennae development in flies d) without molecular data, it is impossible to determine whether one or two genes are controlling the development of this structure in flies

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