What is crossing over? Give its significance.

Monjur Alahi

What is crossing over? Give its significance.


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Salim Ahmed Kawsar

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Crossing over: 

The process of exchange of genetic material between non-sister chromatids of homologous chromosomes is known as crossing over.

Significance of crossing over: 

Crossing over results in genetic recombination of parental characters that leads to variations.

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Crossing over takes place in the ________ stage. 

The correct answer is (C) pachytene

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Crossing over takes place between 

The correct answer is (C) non-sister chromatids of homologues

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Crossing over of chromosomes during meiosis leads to 

The correct answer is (C) new gene combination

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Points at which crossing over has taken place between homologous chromosomes are called 

The correct answer is (A) chiasmata

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Crossing over takes place between which chromatids and in which stage of the cell cycle? 

(C) Non-sister chromatids of homologous chromosomes at Pachytene stage of prophase I

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Arrange the following events of meiosis in correct sequence. (a) Crossing over  (b) Synapsis 

The correct answer is (C) (b),(a), (c), (d)

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Give the formula for electrical conductivity of a solid and give significance of the terms involved.

Electrical conductivity (σ) of a solid is given by  a = nqµ, where, n = charge carrier density (number of charge carriers per unit volume) q = charge on the carriers µ = mobility...

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In a cricket match an over contains six balls. In a T-20 Cricket match it was already 5 balls bowled in the last over.

Correct option is (B) 3 2/3 Let sum of scored runs on first 5 balls in the last over is x. After hitting 6 on last ball of the over, the mean...

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Explain the process of terminal oxidation. Give its significance

1. NADH2 and FADH2 produced during glycolysis, connecting link reaction and Krebs cycle are oxidized with the help of various electron carriers and enzymes. 2. These carriers and enzymes are arranged...

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Crossing over is advantageous because it brings about 

(a) variation

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