Question

Define the following: Chromatin Condensed chromosome Sister chromatids

Define the following:
Chromatin

Condensed chromosome

Sister chromatids
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Answer #1

Chromatin is composed of DNA wrapped by histone proteins which are special proteins that form complex with DNA double helix. Nucleosome is basic unit of chromatin.

Condensed chromosome is tightly wrapped DNA with histone proteins and is called heterochromatin. The DNA packs as 30nm fiber and is condensed during cell division in metaphase chromosome during mitosis and meiosis.

Sister chromatid is defined as half of the duplicated chromosome. Sister chromatid is an identical copy of replicated chromosome. The replicated chromosome copies are attached at the centromere. These sister chromatids are seperated during cell division and each sister chromatid is received by a daughter cell.

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