Genetic Variation and Evolution

Description: Genetic Variation and Evolution Quiz
Number of Questions: 15
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Tags: genetics evolution biodiversity
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What is the primary source of genetic variation in a population?

  1. Mutation

  2. Recombination

  3. Gene flow

  4. Natural selection


Correct Option: A
Explanation:

Mutation is the ultimate source of genetic variation, introducing new alleles into a population.

Which of the following is NOT a type of mutation?

  1. Substitution

  2. Deletion

  3. Insertion

  4. Transversion


Correct Option: D
Explanation:

Transversion is not a type of mutation; it is a specific type of substitution where a purine is replaced by a pyrimidine, or vice versa.

What is the process by which genetic variation is passed from parents to offspring?

  1. Mitosis

  2. Meiosis

  3. Fertilization

  4. Gene flow


Correct Option: B
Explanation:

Meiosis is the process by which genetic variation is passed from parents to offspring. During meiosis, homologous chromosomes pair up and exchange genetic material through a process called crossing over. This results in the production of gametes (eggs and sperm) that contain a unique combination of alleles.

What is the term for the movement of alleles between populations?

  1. Mutation

  2. Recombination

  3. Gene flow

  4. Natural selection


Correct Option: C
Explanation:

Gene flow is the movement of alleles between populations. This can occur through migration, mating, or the dispersal of seeds or pollen.

What is the process by which natural selection acts on genetic variation to produce adaptations?

  1. Mutation

  2. Recombination

  3. Gene flow

  4. Natural selection


Correct Option: D
Explanation:

Natural selection is the process by which natural selection acts on genetic variation to produce adaptations. Natural selection favors individuals with traits that are better suited to their environment, allowing them to survive and reproduce more successfully.

What is the term for the gradual change in the genetic makeup of a population over time?

  1. Mutation

  2. Recombination

  3. Gene flow

  4. Evolution


Correct Option: D
Explanation:

Evolution is the gradual change in the genetic makeup of a population over time. Evolution occurs when natural selection favors certain alleles over others, leading to a change in the frequency of those alleles in the population.

What is the term for the process by which new species are formed?

  1. Mutation

  2. Recombination

  3. Gene flow

  4. Speciation


Correct Option: D
Explanation:

Speciation is the process by which new species are formed. Speciation can occur through a variety of mechanisms, including geographic isolation, reproductive isolation, and natural selection.

What is the term for the measure of genetic variation within a population?

  1. Genetic diversity

  2. Heterozygosity

  3. Allelic richness

  4. Effective population size


Correct Option: A
Explanation:

Genetic diversity is the measure of genetic variation within a population. Genetic diversity can be measured using a variety of metrics, including heterozygosity, allelic richness, and effective population size.

What is the term for the measure of genetic variation between populations?

  1. Genetic diversity

  2. Heterozygosity

  3. Allelic richness

  4. Genetic differentiation


Correct Option: D
Explanation:

Genetic differentiation is the measure of genetic variation between populations. Genetic differentiation can be measured using a variety of metrics, including F-statistics and Nei's genetic distance.

What is the term for the process by which genetic variation is lost from a population?

  1. Mutation

  2. Recombination

  3. Gene flow

  4. Genetic drift


Correct Option: D
Explanation:

Genetic drift is the process by which genetic variation is lost from a population. Genetic drift can occur due to a variety of factors, including natural disasters, population bottlenecks, and founder effects.

What is the term for the process by which genetic variation is increased in a population?

  1. Mutation

  2. Recombination

  3. Gene flow

  4. Genetic drift


Correct Option: A
Explanation:

Mutation is the process by which genetic variation is increased in a population. Mutation can occur spontaneously or be induced by environmental factors.

What is the term for the process by which genetic variation is maintained in a population?

  1. Mutation

  2. Recombination

  3. Gene flow

  4. Balancing selection


Correct Option: D
Explanation:

Balancing selection is the process by which genetic variation is maintained in a population. Balancing selection can occur when there are multiple alleles at a locus that are favored by natural selection.

What is the term for the process by which genetic variation is reduced in a population?

  1. Mutation

  2. Recombination

  3. Gene flow

  4. Genetic drift


Correct Option: D
Explanation:

Genetic drift is the process by which genetic variation is reduced in a population. Genetic drift can occur due to a variety of factors, including natural disasters, population bottlenecks, and founder effects.

What is the term for the process by which genetic variation is increased in a population?

  1. Mutation

  2. Recombination

  3. Gene flow

  4. Genetic drift


Correct Option: A
Explanation:

Mutation is the process by which genetic variation is increased in a population. Mutation can occur spontaneously or be induced by environmental factors.

What is the term for the process by which genetic variation is maintained in a population?

  1. Mutation

  2. Recombination

  3. Gene flow

  4. Balancing selection


Correct Option: D
Explanation:

Balancing selection is the process by which genetic variation is maintained in a population. Balancing selection can occur when there are multiple alleles at a locus that are favored by natural selection.

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