In nasturtiums orange and red petals are determined by, Ask an Expert

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In nasturtiums, orange and red petals are determined by alleles of one gene. A pure-breeding red line is crossed to a pure-breeding orange line, and the progeny are all orange. a. Explain this result, using allele symbols of your own choosing. b. If one of these progeny is selfed, what progeny are expected and in what proportions?

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