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

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

Name only stages of prophase I of meiosis.

  • Ans 1: Following are the sub stages of prophase I of meiosis
  • Ans 2: i) Leptotene ii) zygotene iii) pachytene iv) diplotene v) diakinesis
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12th Class Biology Chapter 21 Short Questions Preparation - Set 3

Question # 1

Give affect of XYY Klinefelter syndrome.

  • Ans 1: The affected persons are phenotypically male but have frequently enlarged breast,tendency to tallness,Obesity,small testes with no sperms at ejaculation and under development of secondary sex characters.
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12th Class Biology Chapter 21 Short Questions Preparation - Set 4

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

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