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Bio 201 exam 3 practice

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BIO 201 Test 3 Review sh Th is ar stu ed d vi y re aC s o ou urc rs e eH w er as o. co m 1. Which of the following statements about Mendel's breeding experiments is correct? A. None of the parental (P) plants were true-breeding. B. All of the F2 progeny showed a phenotype that was intermediate between the two parental (P) phenotypes. C. Half of the F1 progeny had the same phenotype as one of the parental (P) plants, and the other half had the same phenotype as the other parent. D. All of the F1 progeny resembled one of the parental (P) plants, but only some of the F2 progeny did. E. none of the above 2. A cross between homozygous purple-flowered and homozygous white-flowered pea plants results in offspring with purple flowers. This demonstrates A. the blending model of genetics. B. true-breeding. C. dominance. D. a dihybrid cross. E. the mistakes made by Mendel. 3. Which of the following is (are) true for alleles? A. They can be identical or different for any given gene in a somatic cell. B. They can be dominant or recessive. C. They can represent alternative forms of a gene. D. Only A and B are correct. E. A, B, and C are correct. 4. Two plants are crossed, resulting in offspring with a 3:1 ratio for a particular trait. This suggests A. that the parents were true-breeding for contrasting traits. B. incomplete dominance. C. that a blending of traits has occurred. D. that the parents were both heterozygous. E. that each offspring has the same alleles. 5. A 9:3:3:1 phenotyp ...
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