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Assertion (A). Events in pachytene play ...

Assertion (A). Events in pachytene play a key role in evolutionary changes in organisms
Reason`(R)`.Exchange of genetic material takes place between sister chromatids of homologous chromosomes

A

A and R are true, R is corret explanation of A

B

Both A and R are true, R is not the correct explanation of A

C

A is true, R is false

D

A is false, R is true.

Text Solution

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The correct Answer is:
C
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Crossing over is the exchange of genetic material between ______chromatids of homologous chromosomes.

The exchange of genetic material between chromatids of paired homologous chromosomes during first meiotic division is called

[A] : Crossing over takes place during pachytene stage . [R] : It is a process of inter change of chromatin material between one sister chromatid of each homologous chromosome .

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Name the stage of cell cycle at which one of the following events occur Pairing between homologous chromosomes takes place.

Name the stage of cell cycle at which one of the following events occur Crossing over between homologous chromosomes takes place

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Crossing over takes place between : (a) Two sister chromatids (b) Two non-sister chromatids (c) Three homologous chromosomes (d) Four non-homologous chromosomes

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DINESH PUBLICATION ENGLISH-CELL CYCLE (CELL DIVISION)-REVISION QUESTIONS
  1. Arrange the following events of meiosis in correct sequence (a) Cro...

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  2. Find the correct match {:((a),"Anaphase I",(i),"Splitting of the cen...

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  3. Assertion (A). Events in pachytene play a key role in evolutionary cha...

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  4. Identify the correct combination regarding anaphase, anaphase I and an...

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  5. A duplicated chromosome has how many chromatids

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  6. An interconnecting membranous network of the cell composed of vesicles...

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  7. Which of the following is not true for meiosis

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  8. Progression of cell cycle is regulated by the concentration of which t...

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  9. Which of the following phases correspond to the interval between mitos...

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  10. Which of these is not a key feature of meiosis

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  11. When a cell undergoes meiosis, the number of chromosomes in daughter c...

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  12. The enzyme recombinase is required in which stage of meiosis ?

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  13. In meiosis, centromere divides during

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  14. Which of the following is not a characteristic feature during mitosis ...

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  15. A cell at telophase stage is observed by a student in a plant brought ...

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  16. When cells have stalled DNA replication fork, which checkpoint should ...

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  17. Match the stages of meiosis in Column - I to their characteristic feat...

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  18. Identify the meiotic stage in which the homologous chromosomes separat...

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  19. Anaphase Promoting Complex (APC) is a protein degradation machinery ne...

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  20. Which of the following options gives the correct sequences of events d...

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