Clonal selection and differentiation of B cells activated by antigen exposure leads to the production of _____
A) large quantities of the antigen initially recognized
B) vast numbers of B cells with random antigen-recognition receptors
C) long-lived erythrocytes that can later secrete antibodies for the antigen
D) short-lived plasma cells that secrete antibodies for the antigen
D
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An agar plate for counting colonies and maximizing statistical validity should ideally contain
A) 1 to 100 colonies. B) 50 to 100 colonies. C) 30 to 300 colonies. D) 100 to 1000 colonies.
If the frequency of an autosomal recessive trait in humans is 1 out of 100 births, what would be the expected frequency of heterozygote carriers for the trait if we assume that the gene is in Hardy-Weinberg equilibrium?
A. 0.01 B. 0.10 C. 0.18 D. 0.81 E. 0.90 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?
One of the main functions of the cell cycle is to produce daughter cells. What characteristics do the daughter cells have after mitosis is complete?
A) The daughter cells have the same number of chromosomes but the genetic information is different than the parent cell. B) The daughter cells have double the genetic information compared to the parent cell. C) The daughter cells have the identical copies of the genetic information compared to the parent cell. D) The daughter cells have half the genetic information compared to the parent cell.
The physical characteristics an organism possesses that are used to describe, classify, and categorize the organism by appearance are referred to as its_________.
A) phenotype B) genotype