Over several generations in a population, inbreeding tends to
A. decrease the relative proportions of homozygotes.
B. decrease the likelihood of heterozygotes.
C. stabilize the balance of genotypes predicted by the Hardy-Weinberg equilibrium.
D. All of the choices are correct.
B. decrease the likelihood of heterozygotes.
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How does the genus Pfiesteria cause problems in both humans and fish?
What will be an ideal response?
The rash associated with German measles is most likely caused by
A. an immunological reaction to the virus. B. the virus infecting the cells of the dermal layer beneath the skin. C. the virus infecting the cells of the skin. D. All of the choices are correct.
Most of the annual cycling of carbon takes place
between a. groundwater and surface freshwater systems. b. the atmosphere and the land. c. the land and surface freshwater systems. d. the oceans and the atmosphere. e. the oceans and the land.
If the mutation rate of individual genes is taken to be about one in 100,000 genes per cell cycle across many organisms, we might expect evolution to proceed at a consistent rate for various forms of life. Which factor could make the accumulation of gene mutations faster or slower among different organisms?
A. Organisms with more genes will likely have more mutations per generation. B. Organisms vary in the percent of loci that have multiple alleles. C. Some organisms may be more effective at repairing mutations before they are passed on to the next generation. D. More selection of mutations can occur in a shorter period of time for bacteria that replicate each twenty minutes than for humans with a (roughly) 20-year generation span. E. All of the choices are correct.