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- 1. Multiple Choice
Genetic drift is more likely to happen in...
aquatic populations
small populations
terrestrial populations
older populations
- 2. Multiple Choice
Genetic drift is change in the allele frequency of a population due to...
random chance
natural selection
non-random mating (sexual selection)
artificial selection
- 3. Multiple Choice
Which of the following is an example of the founder effect?
Humans choose two dogs they like the characteristics of and breed them together.
Affected individuals with blue skin can trace their ancestry back to one of the first settlers in the region.
The environment of a fox population changes and over time foxes who are white survive and pass on their genes to their offspring.
Cheetah populations reach their lowest levels with reduced diversity and as they rebound are so genetically similar they appear to be inbred.
- 4. Multiple ChoiceA virus killed most of the seals in the North Sea (e.g. dropped the population from 8000 to 800). In an effort to help preserve the species, scientists caught 20 of the remaining seals and used them to start a new population in the northwest Pacific Ocean. Which of the following statements would accurately describe the new population?The new seal population is genetically less diverse than the original populationThe new seal population is genetically more diverse than the original populationThere is equal genetic variety compared to the original populationNone of the answers
- 5. Multiple ChoiceThe type of genetic drift that follows the colonization of a new habitat by a small group of individuals is calledthe Hardy-Weinberg principlethe founder effectdirectional selectionthe bottleneck effect
- 6. Multiple ChoiceOne day a group of scientists collected a small group of brown anole lizards from a large group of the lizards. Then they placed this small group of lizards on an island that had no brown anole lizards on it. What is this an example of?Bottleneck EffectHardy EffectFounder EffectNone of These
- 7. Multiple Choice
This occurs when a large population is drastically reduced by an event such as a natural disaster; the population's new gene pool only contains alleles from the survivors
Founder effect
Bottleneck effect
Meteor effect
Natural selection
- 8. Multiple Choice
If thick-shelled oysters are tougher to crack open than thinner shelled oysters, crabs will be less able to prey upon them, and thick-shelled oysters will be more likely to survive and reproduce. What kind of selection occurred?
Stabilizing Selection
Directional Selection
Disruptive Selection
- 9. Multiple Choice
Average phenotypes are favored in the environment, while extremes have lower survival rates.
Directional Selection
Stabilizing Selection
Disruptive Selection
- 10. Multiple Choice
Light colored cray fish are hard for a predator to see because they blend into the rocks. Dark colored cray fish blend into the shadows cast by the rocks. Intermediate colors are most heavily preyed on.
Stabilizing Selection
Directional Selection
Disruptive Selection
- 11. Multiple Choice
Female robins can lay anywhere from 1-10 eggs. Laying too few eggs runs the risk of them all getting eaten, and laying too many eggs results in malnourished (they don't get enough to eat) chicks. Most robins will lay 4-5 eggs.
Directional Selection
Stabilizing Selection
Disruptive Selection
- 12. Multiple Choice
Frogs with longer tongues are able to catch more food. Frogs with short tongues can't catch as much food and don't usually survive.
Stabilizing Selection
Directional Selection
Disruptive Selection
- 13. Multiple Choice
Which graph shows disruptive selection?
A
B
C
- 14. Multiple Choice
In sunflowers, being too short means not getting enough sunlight. Growing too tall means getting blown around by the wind. Medium height sunflowers tend to survive the best.
Stabilizing Selection
Directional Selection
Disruptive Selection
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