Which of the following techniques is used for detection of variation in DNA sequence and Gene expression?: (A) Nohern blot, (B) Southern blot, (C) Western blot, (D) Microarray
Answer is D. DNA microarray (also commonly known as DNA chip or biochip) is a collection of microscopic DNA spots attached to a solid surface. Scientists use DNA microarrays to measure the expression levels of large numbers of genes simultaneously or to genotype multiple regions of a genome.