Which Of The Following Are Examples Of Heterochromatin?

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Which Of The Following Are Examples Of Heterochromatin?

Select all that apply. a) telomeric DNA b) Barr body c) repetitive DNA d) centromeric DNA
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a) telomeric DNA b) Barr body c) repetitive DNA d) centromeric DNA Repetitive DNA is often associated with heterochromatin. At the centromere, these heterochromatic repetitive sequences facilitate binding of spindle fibers during segregation of homologous chromosomes and sister chromatids. Telomeric repetitive sequences are involved in the maintenance of the chromosome's structural integrity. In other cases, entire chromosomes can be heterochromatic as occurs during X-inactivation in mammalian females where the inactive chromosome forms a highly condensed Barr body.

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