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 change occurs in dividing cell during zygotene?

  • Ans 1: Pairing of chromosomes takes place during the zygetene stage of the meiosis.
    Pairing may start from center to towards end or may start from one end to another end.
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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 change occurs in dividing cell during zygotene?

  • Ans 1: Pairing of chromosomes takes place during the zygetene stage of the meiosis.
    Pairing may start from center to towards end or may start from one end to another end.
Submit

12th Class Biology Chapter 21 Short Questions Preparation - Set 2

Question # 1

Write a brief note on turner's syndrome.

  • Ans 1: These infected individuals have one missing X chromosomes with only 45 chromosomes(44 autosomes + X).Individuals with this condition often do not survive pregnancy and are aborted.Those who survive have female appearance with short stature,webbed neck,without ovaries and complete absence of germs cells.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 3

Question # 1

Differentiate between necrosis and apoptosis.

  • Ans 1: Necrosis: Cell death due to tissue damage is called necrosis
  • Ans 2: Apoptosis: Internal programme of events and sequence of morphological changes by which cell commits suicide is collectively called apoptosis.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 4

Question # 1

What are the events of zygotene of prophase -I of meiosis?

  • Ans 1: First essential phenomenon of meiosis i.e, pairing of homologous chromosomes called synapsis starts. Each paired but not fused,complex structure is called bivalent or tetrad.
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Biology
21th Chapter

12th Class Biology Chapter 21 Short Questions

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