Indicate the answer choice that best completes the statement or answers the question. 1. What commonsense observation makes the theory of preformationism unlikely? a. An individual may inherit traits found in both 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. Alleles that result in abnormal phenotypes may be less common in some populations than in others. e. Offspring often look more like their parents than unrelated individuals. 2. The experiments of Gregor Mendel can be placed into which subdivision of genetics? a. molecular genetics b. population genetics c. transmission genetics d. molecular genetics and transmission genetics e. population genetics and transmission genetics 3. Which of the following pairs is a part of a single nucleotide? a. nitrogenous base and sugar b. sugar and amino acid c. guanine and cytosine, two nitrogenous bases d. amino acid and nitrogenous base 4. A change in allele frequency within a population over time leads to a. a genome. b. a phenotype. c. a genotype. d. mutations. e. evolution.