A researcher has a laboratory strain of flies that have loss-of-function mutations in both gene X and white. These flies are used as hosts for P element transformation: Embryos of the double mutant strain are injected with two plasmids, one containing a wild-type copy of the white gene (w+) and a wild-type copy of gene X, side-by-side within P element inverted repeats, and the other plasmid containing only the P element transposase gene. Transgenic offspring of the injected flies will
A) have both plasmids integrated randomly into the genome.
B) have white eyes and express transposase.
C) have red eyes and a wild-type copy of gene X integrated into a random location in the genome.
D) have red eyes and a wild-type copy of gene X in place of the mutant copy in their genome.
C) have red eyes and a wild-type copy of gene X integrated into a random location in the genome.
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