Figure 1.

Location of probes against a chromosome ideogram. The blue dots clustered around the black vertical line represent individual probes, with the vertical line representing the normal log₂ ratio signal of 0. In this case the patient has a duplication of chromosome 9pter as seen by a shift to the left from the normal by the vertical cluster of probes at that region. In addition, the hybridization in this case is of a female child versus the father, as can be seen by a shift toward the left, signifying a gain, from the normal of all chromosome X probes and shift to the right from the normal, signifying a loss, of all chromosome Y probes.