Complex sentence: CGH is only able to detect unbalanced chromosomal abnormalities as balanced chromosomal abnormalities, such as reciprocal translocations, inversions or ring chromosomes do not affect copy number, which is what is detected by CGH technologies.
Split into simpler sentences: CGH is only able to detect unbalanced chromosomal abnormalities. This is because balanced chromosomal abnormalities, such as reciprocal translocations, inversions or ring chromosomes do not affect copy number, which is what is detected by CGH technologies.