Question

In: Biology

Which of the following are causes of evolutionary change?

Part A

Which of the following are causes of evolutionary change?
Select all that apply.

  • genetic drift
  • natural selection
  • gene flow
  • mutation 

Part B

Generation-to-generation change in the allele frequencies in a population is ______.

  • mutation
  • natural selection
  • microevolution
  • genetic drift
  • macroevolution

Solutions

Expert Solution

Q. Part A. Which of the following is the cause of evolutionary change?

Answer: Option A, B, C, and D (Genetic drift, Natural selection, Gene flow, Mutation)

Explanation: All the given options cause evolutionary changes because a change in a gene pool of a population causes genetic evolution. First: genetic drift causes evolutionary changes. Second: gene flow also causes evolutionary changes because of gene flow there is gain or loss of alleles from a population by the movement in or out the movement of individuals took place. The third is: Natural selection means the success of different phenotypes in a particular environment also brings evolutionary changes. Fourth: Mutation which brings variations that results in evolutionary changes.

Q. Part B. Generation to generation change in the allele frequencies in a population is

Answer: Option C (Microevolution)

Explanation: Microevolution can be defined as the change in the gene frequency in a population with the passage of time. The changes in allele frequencies in microevolution is mainly taking place due to mutations, selection, gene flow, and genetic drift. In microevolution, changes can be seen from one generation to another.

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