Graduate students studying population genetics are assigned the task of determining the allele frequencies of gene Z in a population. After their study is completed, the graduate students report that the frequency of allele ZA is 67%, and the frequency of allele ZB is 23%. What conclusion can you draw from these results?
a. The studied population is in Hardy-Weinberg equilibrium.
b. The sample size in this study was too small to produce accurate results.
c. At least one more allele of gene Z exists in the studied population.
d. The studied population is evolving toward a fully homozygous genotype.
c. At least one more allele of gene Z exists in the studied population.
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How long would the peptide be that is translated from this mRNA sequence: 5'- AUGGGCUACCGA -3'? Yes, that's correct!
a. 0 amino acids b. 2 amino acids c. 3 amino acids d. 4 amino acids
When a neuron undergoes a change in membrane potential that is proportional to (i.e., varies depending on) the strength of the stimulus given to that neuron, this is referred to as a/an
A. equilibrium potential. B. action potential. C. resting potential. D. reversal potential. E. graded potential.
The second law of thermodynamics states that
a. energy can be transformed into matter, and because of this, something is obtained for nothing. b. energy can be destroyed during nuclear reactions such as those that occur inside the sun. c. if energy is gained by one region of the universe, another place in the universe also must gain energy in order to maintain the balance of nature. d. energy tends to flow from concentrated to less concentrated forms. e. none of these is true.
Which of the following explanations of the species-area relationship would be anticipated at the largest, global scales?
A) The number of species increases with area because larger areas contain a greater number of individuals. B) The number of species increases with area because larger areas have more habitats. C) The number of species increases with area because larger areas support distinct evolutionary lineages.