Which statement about analogies is correct? a. They occur only as errors. b. They are synonymous with homologous traits. c. They are derived by similar environmental constraints. d. They are a form of mutation.

What is a genetically identical copy of an organism?   a.Karyotype b.Clone c.Autosome d.Diploid

What is the term for organisms producing different phenotypes due to differences in the environment?    a. Genetic variation   b. Additive variation   c. Phenotypic plasticity   d. Reaction norm

Suppose that an organism is the result of a mating of two parents.Explain how mutation is done.

Why does sickle cell anemia remain more prevalent in Sub-Saharan Africa than in the rest of the world? a. Reduced access to medical facilities presidposes Sub-Saharan Africans to an increased chance od disease. b. The prevalence of malaria in Sub-Saharan Africa provided a selective advantage to individuals who were heterozygous. c. Infection with malaria provides a selective disadvantage to individuals who are heterozygous for the sickle cell allele. d. People of African ancestry are genetically predisposed to carry the sickle cell allele

Which one of the four forces of evolution has the smallest effect on changing allele frequencies?   a. Drift   b. Gene flow   c. Mutation   d. Selection

Explain why scientists preferred proteins as the source of genetic material over DNA.   A. DNA seemed too simple of a molecule compared to proteins   B. Proteins are made up of combinations of 20 different amino acids compared to DNA's 4 bases. The larger number seemed more likely to account for all the variety and diversity in organisms.   C. Scientists knew more about proteins than they did DNA.   D. All of the answers are correct explanations.