AP BIOLOGY

EVOLUTION

EVOLUTION OF A POPULATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is a mechanism that can cause the evolution of a population?
A
gene flow
B
genetic drift
C
natural selection
D
all answers are correct
Explanation: 

Detailed explanation-1: -Natural selection is considered the main mechanism that causes populations to evolve. However, there are several other mechanisms of evolution, including mutation, genetic drift, and gene flow.

Detailed explanation-2: -Mechanisms of evolution correspond to violations of different Hardy-Weinberg assumptions. They are: mutation, non-random mating, gene flow, finite population size (genetic drift), and natural selection.

Detailed explanation-3: -Although natural selection is the mechanism of evolution most commonly discussed, other evolutionary mechanisms also change the frequencies of traits (and the genes that control them) in populations. These include mutation, genetic drift and migration.

Detailed explanation-4: -These different types of evolution include: divergent, coevolution, parallel evolution, and convergent evolution.

Detailed explanation-5: -Mutation, a driving force of evolution, is a random change in an organism’s genetic makeup, which influences the population’s gene pool. It is a change in the nature of the DNA in one or more chromosomes. Mutations give rise to new alleles; therefore, they are a source of genetic variation in a population.

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