The three major mechanisms of evolution differ in how they work, and as a result

Question

The three major mechanisms of evolution differ in how they work, and as a result often have different effects on a population. Review your understanding of natural selection, genetic drift, and gene flow by sorting the statements below into the correct bins. Drag each statement into the appropriate bin depending on whether it applies to natural selection, genetic drift, or gene flow. View Available Hint(s) Reset Help a resuit of differential success in causes allele frequencies to fluctuate andomly responsible for the bottleneck effect cannot cause a harmful allele to become more common consistently causes a population to become better adapted to its a resuit of the movement of fertle indlviduals or their gametes can introduce new alleles into a population's gene poo responsible for the faunder effect natural selection genetic drift gene flow

Explanation / Answer

Answers:

Natural Selection:

consistently causes a population to become better adapted to its environment. (Explanation: Natural selection is a theory of evolution. By definition, it is the survival of organisms that are better suited for a particular environment. The surviving organisms become more adapted to the environment)

a result of differential success in reproduction. (Explanation: Natural selection is also called as Survival of the fittest, those that have advantage tend reproduce better and vice versa. Thus the selection happens due to varied success in reproduction)

cannot cause a harmful allele to become more common. (Explanation: As the advantageous traits are selected, harmful alleles become less common. However, they may not be altogether removed)

Genetic Drift: (Genetic Drift theory of evolution relies on Random occurances that lead to change in the frequency of a partilar gene/allele)

is Responsible for the Bottle Neck effect. (Explanation: Bottleneck effect is a reduction in the population size and subsequent genetic variation as a result of a random accident or a calamity. Randomness makes it fall under Genetic Drift)

is responsible for the Founder effect. (Explanation: This is also a random event, where a small portion of a population randomly separate and form a new colony. Due to the small size of the colony, the genetic variation reduces.)

causes allele frequencies to fluctuate randomly. (Explanation: Genetic drift is primarily a random or a chance occurance that leads to change in the population. Commonly obseved phenomenon is a random fluctuation of allele frequencies. These fluctuations are totally unpredictable)

Geneflow: (This is another theory of evolution which replies on the flow or migration of individuals into a population as the main reason for genetic variation in the population)

can introduce new alleles into a population’s gene pool. (Explanation: When new individuals enter into a population and successfully mate with the existing members of the population, there will be very high chance of introducing new alleles/traits into the population.)

a result of the movement of fertile individuals or their gametes. (Explanation: Geneflow by definition is Evolution in population due to migration or movement of individuals)

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