FGA is one of the STRs that are used to compare DNA between different people. Why is FGA useful for comparing DNA between different people?
A) FGA varies in the number of repeats between different people.
B) FGA varies in sequence between different people.
C) FGA is only present in some peoples' genomes.
D) FGA is present in different places in different peoples' genomes.
A
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Food-borne pathogens are most commonly identified by
A. standard culture techniques. B. polymerase chain reaction (PCR). C. pulsed-field gel electrophoresis. D. None of the choices are correct.
Which of the following vessels does NOT carry deoxygenated (lacking oxygen) blood?
a. inferior vena cava b. pulmonary artery c. pulmonary vein d. superior vena cava e. capillaries
Complete reproductive isolation is evidence that
what has occurred? a. extinction b. speciation c. polyploidy d. hybridization e. gene flow
Which of the following statements about type I reactions is FALSE?
A) They involve helper T cells. B) They involve IgE antibodies. C) The symptoms are due to histamine. D) Antibodies bind to mast cells and basophils. E) The symptoms occur soon after exposure to an antigen.