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Question
The diagram shows a bivalent at prophase-I of meiosis.
Which of the four chromatids can cross over?
Which of the four chromatids can cross over?
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Solution
Crossing over
Crossing over is a phenomenon of exchange of DNA segments (genetic material) between the non-sister chromatids of two homologous chromosomes.
Cross over
In the given figure, cross over will take place between non-sister chromatids, that is, in between one red and one blue chromatid.
Final answer: Non-sister chromatids ( two red chromatids will cross with two blue chromatids respectively).
Crossing over is a phenomenon of exchange of DNA segments (genetic material) between the non-sister chromatids of two homologous chromosomes.
Cross over
In the given figure, cross over will take place between non-sister chromatids, that is, in between one red and one blue chromatid.
Final answer: Non-sister chromatids ( two red chromatids will cross with two blue chromatids respectively).
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