12 Class Fsc Part 2 Short Questions Online Preparation of biology chapter 20 (Chromosoms and DNA)

Online Short Questions For Chapter 6 "12th Class Biology Chapter 20 Short Questions Preparation "

Try The Short Questions For 12th Class Biology Chapter 20 Short Questions Preparation

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Biology - 12th Class Biology Chapter 20 Short Questions Preparation

Question # 1

Define genetic code.

  • Ans 1: Genetic code is combination of three nucleotides,which specify a particular amino acid.
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Prepare Complete Set Wise Questions For Chapter 6 "12th Class Biology Chapter 20 Short Questions Preparation "

12th Class Biology Chapter 20 Short Questions Preparation - Set 1

Question # 1

Define genetic code.

  • Ans 1: Genetic code is combination of three nucleotides,which specify a particular amino acid.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 2

Question # 1

Define Euchromatin.

  • Ans 1: The part of DNA is expressed time to time and condensed only during the cell division is called euchromatin. This coiling helps in movement of chromosomes during cell division.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 3

Question # 1

Mention the types of chromosomes due to centromeric position.

  • Ans 1: There are four types of chromosomes.
    i) Metacentric ii)Sub Metacentric iii)Acrocentric iv)Sub Acrocentric.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 4

Question # 1

What are mutagens? Give one example.

  • Ans 1: In genetics,a mutagen is a physical or chemical agent that changes the genetic material,usually DNA of an organism and thus increases the frequency of mutations.
    For Example: X-ray,ultraviolet radiations etc.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 5

Question # 1

What is mutation? Give its name of two classes.

  • Ans 1: Changes in the DNA occur either due to mistake in replication or damage to the genetic message is known as mutations. its classes are:
    1- Point mutations 2- Chromosomal aberrations.
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12th Class Biology Chapter 20 Short Questions Preparation - Set 6

Question # 1

What are chromosomal aberrations? Give its reasons.

  • Ans 1: Unequal distribution of chromosomes in daughter cell during cell division or any change in the structure of chromosome leads to abnormalities in chromosome in daughter cell,it is called chromosomal aberration.
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12th Class Biology Chapter 20 Short Questions

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