Genetic variation in bacterial populations cannot result from a. transduction. b. conjugation. c. mutation. d. meiosis.

Verified step by step guidance

1. Identify the processes listed and understand their role in genetic variation. Transduction involves the transfer of DNA from one bacterium to another via a virus. Conjugation involves the direct transfer of DNA between two bacteria through a pilus. Mutation refers to changes in the DNA sequence.
2. Recognize that meiosis is a process of cell division that reduces the chromosome number by half and is involved in sexual reproduction, primarily in eukaryotes, not in bacteria.
3. Understand that bacteria reproduce asexually through binary fission, and meiosis does not occur in bacterial cells.
4. Conclude that since meiosis is a process not found in bacteria, it cannot be a source of genetic variation in bacterial populations.
5. Choose the correct answer: d. meiosis.

Key Concepts

Genetic Variation

Genetic variation refers to the diversity in gene frequencies among individuals within a population. It is essential for evolution and adaptation, as it provides the raw material for natural selection. In bacteria, genetic variation can arise through several mechanisms, allowing populations to adapt to changing environments.

Mechanisms of Genetic Exchange

Bacteria can exchange genetic material through several mechanisms, including transduction (transfer via bacteriophages), conjugation (direct transfer between bacteria), and mutation (spontaneous changes in DNA). These processes contribute to genetic diversity, enabling bacteria to acquire new traits, such as antibiotic resistance.

Meiosis in Eukaryotes

Meiosis is a specialized form of cell division that occurs in eukaryotic organisms, leading to the formation of gametes with half the chromosome number. Unlike bacteria, which reproduce asexually and do not undergo meiosis, this process is crucial for sexual reproduction and genetic recombination in multicellular organisms.