The word Centromere is formed from the Greek word Kentron meaning center and meros meaning part. The round, colorless and constricted area in the chromosome is called centromere. Each chromosome has only one centromere. However, some chromosomes may have two or more centromeres. The position of the centromere creates a groove in the chromosome. This is called Mukhyakunchan or Mukhyakhan. Scientist Darlington named it centromere.