Which of following techniques is used for detection of variations in DNA sequence and Gene expression?
## **Core Concept**
The question pertains to molecular biology techniques used for detecting variations in DNA sequences and gene expression. These techniques are crucial in genetics, genomics, and molecular diagnostics for understanding genetic variations, identifying genetic disorders, and studying gene function.
## **Why the Correct Answer is Right**
The correct answer, , refers to **Microarray technology** or **DNA microarray**. This technique allows for the simultaneous analysis of thousands of genes to understand their expression levels. It can detect variations in DNA sequences and measure gene expression by quantifying the mRNA levels of different genes. This is achieved by hybridizing fluorescently labeled RNA or DNA samples to a glass slide or silicon chip that contains thousands of known gene sequences. The intensity of the fluorescence at each spot provides a quantitative measure of gene expression.
## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is blank and cannot be evaluated.
- **Option B:** This option is also blank and does not provide any information for evaluation.
- **Option D:** Similarly, this option is blank and lacks the necessary details for assessment.
## **Clinical Pearl / High-Yield Fact**
A key point to remember is that microarray technology has revolutionized the field of genetics by enabling the study of gene expression on a genome-wide scale. It's widely used in cancer research to identify genes that are differentially expressed in cancer cells compared to normal cells. Additionally, it's used in pharmacogenomics to predict how individuals will respond to certain drugs based on their genetic makeup.
## **Correct Answer:** . **Microarray technology**