Which scenario best illustrates the concept of natural selection?
A)The gene for sickle cell anemia has been passed down for generations because those with sickle cell anemia are typically resistant to malaria.
B)Farmers typically breed only their strongest animals to ensure that the offspring will retain the most desirable characteristics.
C)The gene for brown eyes is dominant;therefore,the most common eye color in the world is brown.
D)As identical twins age,they typically show more physical differences because of epigenetic processes.

Question

Quizplus · Accepted Answer

This scenario illustrates natural selection because individuals with sickle cell anemia are better adapted to survive in malaria-prone areas, which increases their likelihood of passing on their genes to future generations. Over time, the gene for sickle cell anemia becomes more common in the population due to this selective advantage.

B does not illustrate natural selection as it is an example of artificial selection.

C is an example of inheritance patterns, not natural selection.

D is an example of epigenetic changes, which do not necessarily relate to natural selection.

Which Scenario Best Illustrates the Concept of Natural Selection