What type of mutation results in sickle cell
anemia?
a. base- pair substitution
b. insertion
c. deletion
d. frame-shift
e. gene duplication
A
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A population of flowers is in Hardy-Weinberg equilibrium with an allele frequency for white flowers (w) of 40%. What percentage of the flowers will have the colored or dominant phenotype?
A. 16% B. 25% C. 40% D. 60% E. 84% Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about the Hardy-Weinberg principle? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the following lists of taxonomic levels is in correct order, from largest to smallest?
a. domain – kingdom – phylum – class b. species – kingdom – family – order c. genus – family – order – species d. phylum – genus – family – species e. kingdom – family – class - order
Lysol works by disrupting bacterial proteins and the lipid membrane, it has a broad spectrum of action. Triclosan is a disinfectant that works by acting on a single specific protein that bacteria require to make an effective lipid membrane. Triclosan has a specific target and does not have a broad spectrum of action. Is a microorganism more likely to develop resistance to a disinfectant that has a broad spectrum of action such as lysol, or a disinfectant that has a specific target in a bacterial cell such as Triclosan?
A) A disinfectant that has a broad spectrum of action. B) A disinfectant that has a specific target in a bacterial cell.
CD4 and CD8 T cells are likely to become active when they:
A) are attracted by the inflammatory response. B) travel through lymph nodes. C) interact with B-cells. D) travel through the spleen. E) dock with a dendritic cell with a matching antigen.