Fsc part 2 online preparation for biology chapter 21 (Cell Cycle)

Online Short Questions For Chapter 7 "12th Class Biology Chapter 21 Short Questions Preparation "

Try The Short Questions For 12th Class Biology Chapter 21 Short Questions Preparation

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Biology - 12th Class Biology Chapter 21 Short Questions Preparation

Question # 1

What changes in cell take place during diplotene?

  • Ans 1: The paired chromosomes repel each other and begins to separate.Separation however,is not complete,because homologous chromosomes remain united by their point of interchange.Each bivalent has at least one such point,the chromatids other wise separated.
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Prepare Complete Set Wise Questions For Chapter 7 "12th Class Biology Chapter 21 Short Questions Preparation "

12th Class Biology Chapter 21 Short Questions Preparation - Set 1

Question # 1

What changes in cell take place during diplotene?

  • Ans 1: The paired chromosomes repel each other and begins to separate.Separation however,is not complete,because homologous chromosomes remain united by their point of interchange.Each bivalent has at least one such point,the chromatids other wise separated.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 2

Question # 1

Give length of cell cycle during mitosis in human cell.

  • Ans 1: In human average cell cycle is about is 24 hours Mitosis takes 30 minutes, G1phase takes 9 hours, S-phase takes 10 hours, and G2 phase takes 4.5 hours.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 3

Question # 1

How chromatin differs from chromosomes.

  • Ans 1: Chromatin is thread like network,it is formed when chromosomes becomes uncoiled.
    Chromosomes are composed of DNA and protenis. When chromatin is highly coiled it changes in to chromosomes.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 4

Question # 1

Define non-disjunction of chromosomes. Or Define chromosomal non-disjunction.

  • Ans 1: It is chromosomal non disjunction,during which spindle fibers fail to attach with chromosomes and resulting unequal distribution of chromosomes occur.
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21th Chapter

12th Class Biology Chapter 21 Short Questions

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