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At prophase, each chromosome is seen to be made of two chromatids joined at the:

ACentromere
BCentrosome
CCytoplasm
DChloroplast
Answer & Solution
Correct answer: A. Centromere
1. Duplication in S phase gave each chromosome a partner strand. 2. The two are held at one point. 3. That point is the centromere. _Source: syllabus Biology Class XI, Chapter 10, Cell Cycle and Cell Division._
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