Chromosome 21 belongs to which of the following subtype?: (A) Acrocentric chromosome, (B) Metacentric chromosome, (C) Submetacentric chromosome, (D) Telocentric chromosome
Answer is A. Two different arms of the chromosome are separated by a structure known as Centromere. Location of centromere Type of chromosome Example Exactly in the middle Metacentric Towards one side Sub-metacentric 'X' chromosome On the one end Acrocentric 'Y' chromosome, 13,14,15,21,22 chromosome. Right at the tip Telocentric Not seen in humans