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प्रश्न
The diagram shows a bivalent at prophase-I of meiosis. Which of the four chromatids can cross over?
टिप्पणी लिखिए
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उत्तर
In this case, non-sister chromatids can cross over. It is important to remember that crossing over always takes place between two non-sister chromatids and never between two sister chromatids.
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