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Unformatted text preview: balancer/balancer flies from surviving. The only offspring that survive matings of heterozygotes and wild-type homozygotes.-geneticists also use P element transposons that can move in and out of the Drosophila genome. They first insert a cloned gene of interest into the middle of the P element, which also contains a gene for visible characteristic (i.e. eye color). Next, they inject the recombinant P element DNA into eggs, along w/a helper plasmid that encodes the transposase gene. The transposase gene is transcribed and translated in the germ cells of the early embryo, enabling the recombinant P element bearing the gene of interest to insert itself into the embryos germ cell DNA. Progeny will express the eye color marker if the transformation plasmid was inserted into the parents germ cells....
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- Spring '08