A sizable population was analyzed for SNPs in a certain DNA region. Four possible variants were found, with the following frequencies: SNP 1: GGTCTAGGA; frequency = 0.91 SNP 2: GGTGTAGGA; frequency = 0.03 SNP 3: GGTATAGGA; frequency = 0
03 SNP 4: GGTTTAGGA; frequency = 0.03 If the population is in Hardy-Weinberg equilibrium, what is the total frequency of heterozygotes at this SNP locus? A) 0.828
B) 0.009
C) 0.170
D) 0.055
E) 0.0018
C
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The dotted areas in the figure below indicate where
__________ reactions will occur to produce __________ and __________. a. condensation; covalent bonds; hydroxyl ions b. electron transfer; covalent bonds; water molecules c. condensation; covalent bonds; water molecules d. cleavage; covalent bonds; hydrogen ions e. condensation; ionic bonds; hydrogen ions
Which statement about viruses is FALSE?
a. Viruses are not cellular. b. Viruses can manufacture proteins. c. Viruses cannot carry on metabolic activities. d. Viruses can only replicate by infecting other cells. e. Viruses have a protective protein coat called a capsid.
A set of cells in the intestinal epithelium divide continually to replace dead cells lost from the surface of the intestinal lining. If you examined this continually dividing population of intestinal epithelial cells under the microscope, most of the cells would
a. be in meiosis. b. be in mitosis. c. be in interphase. d. have condensed chromatin. e. Both b and d
Select the best response to the question. ?You are reviewing a patient's sputum culture results that have tested positive for Staphylococcus epidermidis. How do you interpret these findings?
A) The patient has a respiratory infection. B) The patient's sputum is no longer sterile. C) This is part of the patient's normal flora. D) The results are inconclusive.