Each chromosome consists of ........ at the beginning of cell division.
Correct answer: B. Two sister chromatids
- A. Two non-sister centromeres
- B. Two sister chromatids
- C. Two non-sister chromatids
- D. Two sister centromeres
Explanation
Both chromatids of same chromosome are sister to each other whereas they are non-sister to the chromatids of other homologue. During gametogenesis both sister chromatids areseparated and each goes to a separate gamete. However, in S phase of cell cycle each chromatid synthesizes its sister chromatid again.
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About Cell Structure and Function
Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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