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Fruit flies with one allele for curly wings (Cy) and one allele for normal wings (Cy+) have curly wings. When two curly-winged flies were crossed, 203 curly-winged and 98 normal-winged flies were obtained. In fact, all crosses between curly-winged flies produce nearly the same curly : normal ratio among the progeny. If a curly-winged fly was mated to a normal-winged fly, how many curly-winged flies would you expect among 270 total offspring?
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