Question

What is the unstained light region of a chromosome ??

Answer 1

The 24 types of human chromosome can be distinguished by different staining procedures. Each chromosome has a unique banding pattern, a distinctive pattern of dark bands (stained regions) and light bands (unstained regions).

Banding of condensed metaphase chromosomes reveals about 450 different bands. Based on the banding pattern and the location of the centromere, chromosomes can be readily identified. High-resolution banding is G- or R-banding of less condensed chromosomes, revealing 550 to 850 bands (as opposed to 450, as mentioned above). Usually involving prophase or prometaphase chromosomes, high-resolution banding helps pinpoint structural abnormalities.