In horizontal gene transfer, genes are not passed from parents to offspring; they are transmitted within a generation. What term describes this?

In horizontal gene transfer, genes are not passed from parents to offspring; they are transmitted within a generation. What term describes this?

• A. Vertical Gene Transfer
• B. Binary Fission
• C. Horizontal Gene Transfer
• D. Mutation

Answer: (C)

This question tests understanding of how genes can move between organisms within the same generation rather than along a family lineage. Horizontal gene transfer describes the transfer of genetic material between individuals in a way that bypasses the parent-to-offspring path. It explains why genes can spread across unrelated organisms in the same generation, through processes like transformation, transduction, or conjugation in many bacteria and archaea. In contrast, vertical gene transfer is inheritance from parents to offspring, which is the traditional lineage-based mode of passing genes down. Binary fission is a way some organisms reproduce asexually, producing copies, but it isn’t about transferring genes between individuals. Mutation refers to a change in the DNA sequence within an organism, creating variation, not a transfer event between organisms. So the term that best fits the idea of gene movement within a generation, independent of parental inheritance, is horizontal gene transfer.

This question tests understanding of how genes can move between organisms within the same generation rather than along a family lineage. Horizontal gene transfer describes the transfer of genetic material between individuals in a way that bypasses the parent-to-offspring path. It explains why genes can spread across unrelated organisms in the same generation, through processes like transformation, transduction, or conjugation in many bacteria and archaea.

In contrast, vertical gene transfer is inheritance from parents to offspring, which is the traditional lineage-based mode of passing genes down. Binary fission is a way some organisms reproduce asexually, producing copies, but it isn’t about transferring genes between individuals. Mutation refers to a change in the DNA sequence within an organism, creating variation, not a transfer event between organisms.

So the term that best fits the idea of gene movement within a generation, independent of parental inheritance, is horizontal gene transfer.