TEST BANK FOR GENETICS ESSENTIALS CONCEPTS AND CONNECTIONS, 4TH EDITION BENJAMIN A. PIERCE

Name: Class: Date: chapter 1 Indicate the answer choice that best completes the statement or answers the question. 1. Within cells, genes are located on structures called: a. genomes. b. chromosomes. c. phenotypes. d. genotypes. e. alleles. 2. What commonsense observation makes the theory of blending inheritance unlikely? a. An individual may inherit traits found in only one of his or her parents. b. Anatomical changes such as loss of a limb are not seen in the offspring of an individual. c. Evolution requires genetic change in populations. d. Some traits disappear in one generation and then reappear in the next generation. e. Offspring often look more like their parents than unrelated individuals. 3. The contribution Charles Darwin made to biology was to: a. demonstrate the connection between Mendel's principles of inheritance and evolution. b. propose that evolution occurs by natural selection. c. develop the theory of evolution, based on earlier theories of population genetics. d. connect the fields of evolution and molecular genetics. e. determine the first DNA sequence for a free-living organism. 4. Albinism is rare in most human populations, occurring at a frequency of about 1 in 20,000 people. However, the trait occurs at a frequency of 1 in 200 in certain Hopi villages of Black Mesa in Arizona. In light of this example and others that you might be aware of, what can you conclude about particular alleles such as the allele for albinism? a. Any allele that leads to an abnormal phenotype will be rare in most populations but common in Native American populations. b. Alleles that produce abnormal phenotypes are never beneficial. c. An allele that leads to an abnormal phenotype may be beneficial in some environments but harmful in others. d. An allele that leads to an abnormal phenotype will rise in frequency after many generations. e. An allele that leads to an abnormal phenotype will soon disappear from a population. 5. Which of the following theories of inheritance is no longer accepted as TRUE? a. pangenesis b. blending inheritance c. inheritance of acquired characteristics d. preformationism