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 "

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Biology - 12th Class Biology Chapter 21 Short Questions Preparation

Question # 1

Characterize pachytene stage of meiosis.

  • Ans 1: Pairing of homologous chromosomes is completed,chromosomes become further thick and short and crossing over takes places by chiasmata formation.
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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

Characterize pachytene stage of meiosis.

  • Ans 1: Pairing of homologous chromosomes is completed,chromosomes become further thick and short and crossing over takes places by chiasmata formation.
Submit

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

Question # 1

Discuss diakinesis in meiosis.

  • Ans 1: During this phase the condensation of chromosomes reaches to its maximum.At the same time separation of homologous chromosomes is completed,but still they are united at one point,more oftenly at ends.Nucleoli disappear.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 3

Question # 1

How does cell death help in development of multicellular organisms?

  • Ans 1: Programmed cell death help in proper control of multicellular organisms development,which may lead to deletion of entire structure (e.g.,the tail of the developing human embryo) or a part of structure (e.g.,tissues between developing digits).Cell death even controls number of neurons because most of the neurons in human body die during development.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 4

Question # 1

Give four important functions of mitosis.

  • Ans 1: Four functions of mitosis are
  • Ans 2: a) Asexual reproduction is due to mitosis
    b) Healing of wounds and regeneration is also due to mitosis
    c) It ensure equal or same number chromosomes in daughter cell
    d) It transfer characters from parents to offspring without any change
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Biology
21th Chapter

12th Class Biology Chapter 21 Short Questions

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