A Portion of a Microarray Is Shown Above in Which

Multiple Choice

A portion of a microarray is shown above in which the expression of genes on human chromosome 21 was examined in normal brain cells (cDNAs labeled with a white fluor) or brain cells from an individual with a neurological disorder (cDNAs labeled with a black fluor) .
Which genes are over-expressed in the abnormal cells compared to the normal cells?

A) A2, B1, B3, and C4
B) B2 and C1
C) A1, A3, A4, B4, C2, and C3
D) A1, A2, B2, and C1
E) A2, C2, and C4