AP Bio Unit 5 Practice Test Complete Solutions

AP Bio Unit 5 Practice Test Complete Solutions A plant with purple flowers is allowed to self-pollinate. Generation after generation, it produces purple flowers. This is an example of a. hybridization b. incomplete dominance c. true-breeding d. the law of segregation enetics. ️c What is the difference between a monohybrid cross and a dihybrid cross? a. A monohybrid cross involves a single parent, whereas a dihybrid cross involves two parents b. A monohybrid cross produces a single progeny, whereas a dihybrid cross produces two progeny c. A monohybrid cross involves organisms that are heterozygous for a single character, whereas a dihybrid cross involves organisms that are heterozygous for two characters d. A monohybrid cross is performed only once, whereas a dihybrid cross is performed twice e. A monohybrid cross results in a 9:3:3:1 ratio whereas a dihybrid cross gives a 3:1 ratio ️c A cross between homozygous purple-flowered and homozygous white-flowered pea plants results in offspring with purple flowers. This demonstrates a. true-breeding b. the blending model of genetics c. dominance. d. a dihybrid cross e. the mistakes made by Mendel ️c What was the most significant conclusion that Gregor Mendel drew from his experiments with pea plants? a. There is considerable genetic variation in garden peas b. Traits are inherited in discrete units, and are not the results of "blending." c. Recessive genes occur more frequently in the F1 than do dominant ones. d. Genes are composed of DNA. e. An organism that is homozygous for many recessive traits is at a disadvantage ️b 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 ️e How many unique gametes could be produced through independent assortment by an individual with the genotype AaBbCCDdEE? a. 4 d. 32 b. 8 e. 64 c. 16 ️b 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 ️d A sexually reproducing animal has two unlinked genes, one for head shape (H) and one for tail le