Biology
Grade-9
Easy
Question
Which of the three graphs shows stabilizing selection?
- A
- B
- C
- None of the above
Hint:
The graph shows stabilizing selection where the central portion is narrower and a bit taller.
The correct answer is: C
- The population will go through stabilizing selection if natural selection supports an average phenotype by favoring extreme variation.
- Natural selection would typically favor individuals that blend in with the forest floor and are less likely to be seen by predators, for instance, in a colony of mice that live in the woods.
- Those mice whose fur closely resembles the color of the ground will presumably live and breed and will pass on their genes for their brown coat if the ground is a reasonably consistent shade of brown.
- Mice with alleles that make them somewhat lighter or darker stand out against the background and are more likely to perish from predators.
- This stabilizing selection will reduce the genetic variance in the population.
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