A gardener crosses a snapdragon plant that has white flowers with a snapdragon plant with red flowers. All the offspring in the F1 generation produce pink flowers. The gardener crosses two of the plants with pink flowers, and the snapdragon plants of the F2 generation have red, white, and pink flowers. Infer reasons for the gardener's observations.
Added by Rebecca T.
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Step 1: The gardener crosses a snapdragon plant with white flowers with a snapdragon plant with red flowers, resulting in all offspring in the F1 generation producing pink flowers due to incomplete dominance. Show more…
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You cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered snapdragon. all of the f1 are pink. what can you say about the alleles for the parental traits? you cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered snapdragon. all of the f1 are pink. what can you say about the alleles for the parental traits? both red and white are recessive. red is dominant. red and white show incomplete dominance. pink is dominant, whereas red and white are recessive.
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In the snapdragon, individual plants can be red flowered, pink flowered, or white flowered. According to a certain Mendelian genetic model, self-pollination of pink-flowered plants should produce progeny that are red, pink, and white with the following proportions: 1/4, 1/2, and 1/4, respectively. A geneticist self-pollinated randomly selected pink-flowered snapdragon plants and produced the following progeny. Flower Type Red Pink White Number 54 102 58 Using a significance level of 0.05, test the claim that the three colours do not follow the Mendelian genetic model. Use the p-value method. For full marks, include a diagram of the distribution indicating important components of the question.
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Two plants with white flowers, each from true-breeding strains, were crossed. All the $\mathrm{F}_{1}$ plants had red flowers. When these $\mathrm{F}_{1}$ plants were intercrossed, they produced an $\mathrm{F}_{2}$ consisting of 177 plants with red flowers and 142 with white flowers. (a) Propose an explanation for the inheritance of flower color in this plant species. (b) Propose a biochemical pathway for flower pigmentation and indicate which genes control which steps in this pathway.
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