Question : What is centromere? Describe types of chromosomes on the basis of position of centromere.

Question : What is centromere? Describe types of chromosomes on the ba

1.	Question : What is centromere? Describe types of chromosomes on the basis of position of centromere.
Answer» Solution :Centromere, also called primary constriction, is a lightly coloured constricted area at which TWO sister chromatids of a chromosome are JOINED. On the basis of position of centromere, the chromosomes are of four TYPES: (i) Telocentric when centromere is terminal in position. (ii) Acrocentric when centromere is subterminal in position. (III) Submetacentric when centromere is NEAR the centre. (iv) Metacentric when centromere is at the centre of chromosome.