Biology
Grade-9
Easy
Question
In a finch population, if finches having large beaks and finches having small beaks increase in numbers while finches with average beaks decreases, which pattern of natural selection has occurred?
- Stabilizing selection
- Disruptive selection
- Directional selection
- Genetic drift
Hint:
In a finch population, if finches having large beaks and finches having small beaks increase in numbers while finches with average beaks decreases is directional selection.
The correct answer is: Disruptive selection
- Large-beaked: Darwin's finches may have an advantage over medium and small-beaked species due to their ability to consume seeds with thicker husks, which improves their chances of survival and procreation in only one direction.
- The disruptive selection favors the population of extreme traits that are completely dominant and completely recessive.
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