Question

a group of students is walking in the park, and one of them takes a picture of a pollen grain that is being blown by the wind. what caption can the student use for this picture?

• gene mutation in action
• gene flow at work
• genetic drift as it happens
• natural selection in progress

Explanation:

• Gene mutation: Refers to a change in the DNA sequence. A pollen grain being blown by the wind is not a mutation event.
• Gene flow: Also known as gene migration. It is the transfer of genetic material (in plants, pollen can carry genetic material) from one population to another. When pollen is blown by the wind, it can potentially transfer genetic material to a different plant population, which is an example of gene flow.
• Genetic drift: Refers to random changes in allele frequencies in a population. It is usually due to chance events like a small - scale disaster affecting a small sub - population. Pollen dispersal by wind is not a random change in allele frequencies in the sense of genetic drift.
• Natural selection: Is the process by which organisms better adapted to their environment tend to survive and produce more offspring. There is no indication of differential survival or reproduction based on adaptation in the case of a pollen grain being blown by the wind.

Answer:

gene flow at work