Which of the following contribute to an increased probability of a random match of a DNA profile in a population?
A) a random population with many relatives
B) a population containing limited VNTR variation
C) a population with inbreeding
D) a population with a small number of identical twins
Answer: C
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A paralog ____________
A. is found for every gene in mammals B. is only found on the X but not the Y chromosome C. can explain the lack of phenotype for a gene knockout D. cannot be mutated E. has the same DNA sequence as the original duplicated gene
An earthworm detects sound ____
a. through specialized tympanic membranes located near the head b. through a thinned region of the exoskeleton that forms a tympanum c. through general mechanoreceptors on its skin d. by using a specialized organ that measures the frequency of vibration of the surrounding dirt particles e. through a series of mechanoreceptors arranged in a lateral line
_____ groups impart polarity to alcohols
a. hydroxyl (-OH-) c. methyl (-CH3) b. phosphate (-PO4-) d. sulfhydryl (-SH)
Which of the following statements is incorrect concerning the use of drug therapy in an HIV-positive patient?
A) Reverse transcriptase inhibitors can help to slow the virus from entering into host chromosomes. B) Protease inhibitors can slow the assembly of new viruses. C) If drug therapy is used in a confirmed HIV-positive patient, all HIV viruses can be successfully eliminated from the body. D) Two or more drugs can be combined to form a "drug cocktail."