Why is it unethical to use humans in experimental genetics? Explain your reasoning What will be an ideal response?
ANSWER: Answers will vary. Students may discuss the physical, mental, and emotional harm that may
occur from experiments with unknown outcomes.
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Fly species W, found in a certain part of the island, produces fertile offspring with species Y. Species W does not produce fertile offspring with species X or Z. If no other species can hybridize, then which of the following statements about species W
and Y are true? I) Species W and Y have genomes that are still similar enough for successful meiosis to occur in hybrid flies. II) Species W and Y have more genetic similarity with each other than either did with the other two species. III) Species W and Y may fuse into a single species if their hybrids remain fertile over the course of many generations. A) Only I is correct. B) Only II is correct. C) Only III is correct. D) I, II, and III are correct.
Which of the following statements about innate immunity is FALSE?
a. It involves a variety of chemicals, including defensins and complement. b. It involves a variety of cells, including phagocytes and NK cells. c. It protects against viruses and other pathogens. d. It must be primed by the presence of antigens. e. It has no memory of prior exposure to an organism.
Which hormone prepares the uterus to receive and nourish a fertilized egg?
A) Progesterone B) Insulin C) FSH D) Oxytocin E) Luteinizing hormone (LH)
The ________ of a population is the time it takes for the cells to double in number
A) binary fission B) exponential growth C) generation time D) arithmetic growth E) log phase