Question

A DNA chip (microarray) evaluates a person’s genotype markers through binding of their DNA to the DNA probes attached to the chip.

True

False

Answer 1

A DNA microarray is a collection of microscopic DNA spots attached to a solid surface. It is used to measure the expression levels of a large number of genes at one time or to genotype multiple regions of the genome.

When a gene is expressed in a cell, it generates messenger RNAs. The DNA copy that is made [ complementary DNA or cDNA ] is then applied to the microarray. A microarray is a laboratory tool that is printed with thousands of tiny spots in definite positions, with each spot containing a known DNA sequence. Tha DNA molecules attach to these probes. So, the above statement is true.