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Question
Which of the following stages involves repulsion of homologous chromosomes ?
Which of the following stages involves repulsion of homologous chromosomes ?
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Solution
The correct option is D Diplotene
The two important events of diplotene stage are repulsion and terminalization. They are as follows-
1. In repulsion the homologous chromosomes starts to separate and uncoil as the homologous chromosomes starts repelling each other. The crossing over of non-sister chromatids takes place during this stage. The point at which the non-sister chromatids cross each other is known as chaismata.
II. The terminalization of chaismata occurs due to its progressive shifting towards the end.
Thus, the correct answer is option D.
The two important events of diplotene stage are repulsion and terminalization. They are as follows-
1. In repulsion the homologous chromosomes starts to separate and uncoil as the homologous chromosomes starts repelling each other. The crossing over of non-sister chromatids takes place during this stage. The point at which the non-sister chromatids cross each other is known as chaismata.
1. In repulsion the homologous chromosomes starts to separate and uncoil as the homologous chromosomes starts repelling each other. The crossing over of non-sister chromatids takes place during this stage. The point at which the non-sister chromatids cross each other is known as chaismata.
II. The terminalization of chaismata occurs due to its progressive shifting towards the end.
Thus, the correct answer is option D.
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