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What is each copy of the duplicated chromosome called?

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in Biology – Class 12 by (271k points)
What is each copy of the duplicated chromosome called?

(a) Chromatid

(b) Chromomere

(c) Kinetochore

(d) Chromonema

This question was addressed to me in an interview for job.

My doubt stems from Chromosomal Theory of Inheritance-2 topic in chapter Principles of Inheritance and Variation of Biology – Class 12

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Right answer is (a) Chromatid

For explanation I would say: The chromosomes duplicate during the G2 phase of the cell cycle. Each copy of the chromosome is identical and is hence called a chromatid. The G2 phase is followed by M phase or meiotic phase, where the chromatids align together at the metaphase plate followed by segregation during the anaphase.

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