Which of the following is an example of gene flow?

• A. A mutation occurring in a single individual
• B. Genetic drift causing allele frequency changes in a small population
• C. Natural selection favoring a specific trait in a population
• D. A bee carrying pollen from one flower population to another

Answer: (D)

Verified step by step guidance

1. Understand the concept of gene flow: Gene flow refers to the transfer of genetic material from one population to another, which can occur through various mechanisms such as migration or the movement of individuals or gametes.
2. Identify the examples provided: The problem lists several scenarios, including mutation, genetic drift, natural selection, and a bee carrying pollen between flower populations.
3. Evaluate each scenario: Consider how each scenario affects genetic variation within and between populations. Mutation affects genetic variation within an individual, genetic drift affects allele frequencies within a population, and natural selection affects trait prevalence within a population.
4. Focus on the bee carrying pollen: This scenario involves the movement of genetic material (pollen) from one flower population to another, which introduces new genetic material into the recipient population.
5. Conclude that the bee carrying pollen is an example of gene flow: This scenario fits the definition of gene flow as it involves the transfer of genetic material between populations, potentially altering genetic diversity and allele frequencies in the recipient population.