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

Question

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

Quizplus · Accepted Answer

Genes 4 and 8 are indicated as downregulated in the UV light-exposed group, suggesting a decrease in their expression levels compared to a control or non-exposed group.

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