- Jan 17, 2021
But isn’t the bird causing a change in allele frequencies over generations? So can’t it be classified as genetic driftI believe it's because the predator (birds) acts as a selection pressure, which reduces the number of dark beetles over time.
Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance (sampling error). This definition therefore suggests that genetic drift would not be something that applies to this question, making D the correct answer.
This is an example of a scenario that is similar to the question:But isn’t the bird causing a change in allele frequencies over generations? So can’t it be classified as genetic drift