The chromosome which looks like lamp brush or lamp brush is called lamp brush chromosome. These chromosomes have several pairs of loops centered on their axis and look like chimney brushes or lamp brushes. The axis of the chromosome is composed of chromomeres and inter-chromomeres and loop transcribing genes. Its length is 1500-2000 micrometers. It is required for the formation of sperm and egg yolk. In 1882, the embryologist Rishabh Sarham was the first to discover this chromosome from the egg of an asymmetric amphibian. It is found in oocytes or immature eggs of fish, amphibians, reptiles, birds and insects. However, it is not found in the ovum of mammals. Embryologist Flemming first discovered this chromosome from the egg of the amphibian Amblystoma maxicanum. It is found in oocytes or immature eggs of fish, amphibians, reptiles, birds and insects. However, it is not found in the ovum of mammals.