If the frequencies of recessive and dominant alleles in a population do not change over time, that population
a) is evolving
b) is migrating
c) is exhibiting genetic drift
d) is in Hardy-Weinberg equilibrium
e) will soon be extinct
Answer: d) is in Hardy-Weinberg equilibrium
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Why was it informative for researchers to study the proximate causation of Daphnia switching reproductive tactics in the laboratory?
A) Daphnia in the wild were genetically identical and the laboratory was the only place where Daphnia would reproduce sexually. B) Daphnia could not obtain enough energy in the wild to reproduce sexually. C) Daphnia were no longer available in the wild when the investigations occurred. D) Daphnia were never under high crowding conditions in the wild.
All prokaryotic photosynthesizers are anoxygenic.
Answer the following statement true (T) or false (F)
A farmer decides to go into the business of raising trout for tourists who enjoy fishing. She builds six trout ponds and stocks each of them with trout from genetically identical stock. Her friends tell her that because she started each pond with just a
few trout, she has created a bottleneck effect and her trout populations are likely to become genetically different rapidly. Which of the following statements about her trout is likely true? A) Because they are all genetically alike, they will all remain alike even though the ponds are different. B) Because each population started off genetically identical, any mutation that occurs in one pond will also occur in the others. C) Because the ponds are different and the populations are likely to experience different mutations, the populations will likely diverge evolutionarily, but only over many generations. D) The increase in genetic diversity caused by sexual reproduction will promote evolutionary divergence over time.
What is the initiating codon for translation and what amino acid does it encode?
What will be an ideal response?