Which of the following is an example for facultative heterochromatin?: (A) Centromere, (B) Telomere, (C) Barr body, (D) All of the above
Answer is C. Heterochromatin is of two types: Constitutive heterochromatin Facultative heterochromatin Centromeric DNA Telomeric DNA Barr body (condensed X-chromosome) Condensed, inactive Decondenses during gametogenesis