After one generation of inbreeding, one would expect to see _______ in heterozygotes but no change in _______ frequencies
What will be an ideal response?
ANS:
an decrease, allele
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The only class of antibody that can cross the placenta is
A. IgA. B. IgD. C. IgG. D. IgE.
The continental rise is composed of sediments deposited from:
a. biological activity. b. underwater landslides. c. midocean ridges. d. windblown sources. e. cosmogenous sources.
A metagenomic study from a never-before-seen type of gingival infection indicates the presence of large numbers of archaea. Which of the following would be a good practice to isolate this organism?
A. Incubate the isolation medium adjacent to a bright full-spectrum light. B. Incubate the isolation medium at about 90°C. C. Adjust the pH of the medium to below 5. D. Use an anaerobic medium and incubate in a sealed container.
In meiosis I, cytokinesis usually occurs after telophase I and produces
A. one diploid cell. B. one haploid cell. C. four haploid cells. D. two diploid cells. E. two haploid cells.