Which of the following is not a source of genetic variation?

• A. Gene flow
• B. Natural selection
• C. Genetic recombination
• D. Mutations

Answer: (B)

Verified step by step guidance

1. Understand the concept of genetic variation: Genetic variation refers to the differences in DNA sequences among individuals within a population. It is crucial for evolution and adaptation.
2. Identify sources of genetic variation: Common sources include mutations, genetic recombination, and gene flow. Each of these contributes to the diversity of genetic material in a population.
3. Explain mutations: Mutations are changes in the DNA sequence that can introduce new genetic variations. They occur randomly and can be beneficial, neutral, or harmful.
4. Describe genetic recombination: Genetic recombination occurs during meiosis when homologous chromosomes exchange genetic material, leading to new combinations of genes in offspring.
5. Clarify gene flow: Gene flow is the transfer of genetic material between populations, which can introduce new genetic variations into a population. Natural selection, however, is a process that acts on existing genetic variation rather than creating it.