2. Somatic cells include all of the following except a. b. Sex cells. c. Skin cells. d. Bone cells. Lung cells. 3. The following are complementary bases in DNA. a. Adenine and thymine. b. Adenine and cytosine. c. Guanine and thymine. d. Guanine and adenine. 4. Meiosis results in the production of a. Two daughter cells. b. Four daughter cells. c. A single cell. d. Bone cells. 5. The presence of a recessive allele a. Can always be determined from the phenotype. b. Can be masked in the phenotype. c. Is expressed in the phenotype alongside the dominant allele. d. All of the above. 6. Mutation a. Works most effectively on small populations. b. Works to decrease variation between populations. c. Can be the source of a brand new trait in a population. d. None of the above. 7. is the force of evolution that is most powerful when acting on small populations. a. Gene flow b. Mutation c. Variation d. Genetic drift 8. Evolution is caused by which of the following? a. Mutation. b. Gene flow. c. Genetic drift. d. All of the above.