Imagine that you are studying a very large population of moths that is isolated from gene flow. A single gene controls wing color. Half of the moths have white-spotted wings (genotype WW or Ww), and half of the moths have plain brown wings (ww). There
are no new mutations, individuals mate randomly, and there is no natural selection on wing color. How will p, the frequency of the dominant allele, change over time?
A) p will increase; the dominant allele will eventually take over and become most common in the population.
B) p will neither increase nor decrease; it will remain more or less constant under the conditions described.
C) p will decrease because of genetic drift.
D) p will fluctuate rapidly and randomly because of genetic drift.
Answer: B
You might also like to view...
Match the following items with the correct phrases.
_______1. Found in the cell walls of both Gram-positive and Gram-negative bacteria, but greater quantities are found in the cell walls of Gram-positive bacteria. _______2. Found in the cell walls of algae, but not in the cell walls of other microorganisms. _______3. Found in the cell walls of Gram-positive bacteria, but not in the cell walls of Gram-negative bacteria. _______4. Found in the cell walls of fungi, but not in the cell walls of other microorganisms. _______5. Found in the cell walls of both Gram-positive and Gram-negative bacteria, but not found in the cell walls of archaeans. a. cellulose b. chitin c. peptidoglycan d. teichoic acids
Which is an incorrect match of taxonomic category and common name?
A. Dipnoi/lungfish B. Actinopterygii/ray-finned fish C. Apoda/caecilians D. Squamata/lizards and snakes E. theropods/crocodiles
If formerly interbreeding organisms are prevented from the production of fertile offspring, _____ has occurred
a) geographic isolation b) behavioral isolation c) physiological isolation d) reproductive isolation e) punctuated isolation
The mechanism that allows many Na+ ions to move into the axon is
A. negative feedback. B. positive feedback. C. equilibrium feedback. D. None of the choices are correct.