ON THE BASIS OF POSITION OF CENTROMERE
METACENTRIC
The centromere is located at the centre of the chromatids and arms on either side of centromere are equal in length.
SUB-METACENTRIC
The centromere is located slightly away from the centre. This results in formation of arms of unequal length.The smaller arm is called p-arm and the longer arm is called q-arm.
ACROCENTRIC
The centromere is located far from the centre and close to the telomere. In Acrocentric chromosomes, the difference in length of the arms is more as compared to Sub-metacentric chromosomes. (p<<q)
TELOCENTRIC
The centromere is located at the terminal part of the chromosomes.
