A method of comparing the relative gene expression of all the genes in an organism at two different stages of its development is:
A) a DNA microarray.
B) yeast two-hybrid analysis.
C) tandem affinity purification.
D) immunofluorescence.
E) quantitiative PCR.

Question

Quizplus · Accepted Answer

A DNA microarray can measure the relative gene expression levels of thousands of genes simultaneously in a single experiment, making it an ideal method for comparing gene expression at different stages of development. The microarray consists of a small chip with thousands of different DNA sequences on it, each representing a different gene. By labeling RNA extracted from the organism at each developmental stage with different fluorescent dyes and hybridizing it to the microarray, researchers can determine which genes are upregulated or downregulated in each stage.

A Method of Comparing the Relative Gene Expression of All