Section: Science

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In flowers, the gene for red color is dominant over the gene for white color. We will specify the gene for white flowers as r, and the gene for red flowers as R. Each flower has two genes for color (one from each parent) and donates only one gene for color to its offspring. White flowers have the genotype rr. Any other genotype leads to Red flowers. 

Consider the Punnett square. The offspring of these two parents: