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Metaphase

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Question

The diagram shows a bivalent at prophase-I of meiosis. Which of the four chromatids can cross over?

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Solution

In Meiosis non-sister chromatids of homologous chromosomes can cross over, crossing over always takes place between two non-sister chromatids and never between two sister chromatids.

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The diagram shows a bivalent at prophase-I of meiosis. Which of the four chromatids can cross over?

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A bivalent meiosis- I consists of
(a) two chromatids and one centromere
(b) two chromatids and two centromeres
(c) four chromatids and two centromeres
(d) four chromatids and four centromeres

Q. The diagram shows a bivalent at prophase-I of meiosis.

Which of the four chromatids can cross over?

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