Jumping gene is known as?
**Core Concept**
The "jumping gene" refers to a mobile genetic element that can change its position within a genome, often by replicating and inserting itself into new locations. This process is known as transposition.
**Why the Correct Answer is Right**
Transposons are a type of mobile genetic element that can move from one location to another within a genome. They are responsible for the movement and rearrangement of genes, which can lead to genetic variation and diversity. Transposons can be classified into two main categories: DNA transposons, which move by a cut-and-paste mechanism, and retrotransposons, which move by a copy-and-paste mechanism involving an RNA intermediate. The correct answer, transposon, refers to any mobile genetic element that can change its position within a genome.
**Why Each Wrong Option is Incorrect**
**Option B:** Retroposon is a type of retrotransposon, which is a specific type of mobile genetic element that moves by a copy-and-paste mechanism involving an RNA intermediate. While retroposons are a type of transposon, the term "transposon" is more general and encompasses a broader range of mobile genetic elements.
**Option C:** Insertion sequence is a type of DNA transposon that is typically found in bacteria. While insertion sequences are indeed a type of transposon, the term "transposon" is more general and can refer to mobile genetic elements in eukaryotes as well.
**Option D:** Integron is a type of genetic element that can capture and integrate genes from the environment, but it is not a type of transposon. Integrons are often found in bacteria and are involved in the spread of antibiotic resistance genes.
**Clinical Pearl / High-Yield Fact**
The discovery of transposons has had significant implications for our understanding of genetic variation and evolution. Transposons have been found to contribute to the development of genetic diseases, such as cancer and neurological disorders, and have also been implicated in the spread of antibiotic resistance genes in bacteria.
**✓ Correct Answer: A. Transposon**