Use the Following to Answer Questions
a Researcher Is $\bullet$

Multiple Choice

Use the following to answer questions
A researcher is interested in studying Drosophila genes that are turned on in response to UV light exposure. She uses a microarray to carry out her experiment and is particularly interested in eight genes shown in the microarray below.
$\bullet$ Vertical stripes mean hybridization to UV light-exposed cell cDNA only.
$\bullet$ Horizontal stripes mean hybridization to nonexposed cell cDNA only (control) .
$\bullet$ Completely filled in means hybridization to both cDNA types.
$\bullet$ Blank means hybridization to neither cell's cDNA.
-Which genes appear to be downregulated in the UV light-exposed group?

A) 1, 3, and 5
B) 2 and 7
C) 4, 6, and 8
D) 6 only
E) 4 and 8 only