When the centromere is situated in the middle of two equal arms of chromosome, the chromosome is referred as:
Metacentric
Sub-metacentric
Acrocentric
Telocentric
When the centromere is situated in the middle of two equal arms of chromosome, it is called Metacentric chromosome.
When the centromere is present slightly away from the middle, it is called sub-metacentric chromosome.
When the centromere is present very close to one end of the chromosome, it is known acrocentric chromosome.
When the centromere is present at terminal position, chromosome is refers as telocentric.