12th Class Fsc Biology Online Preparation for chapter 22 (Variation and Genetics)

Online Short Questions For Chapter 8 "12th Class Biology Chapter 22 Short Questions Preparation "

Try The Short Questions For 12th Class Biology Chapter 22 Short Questions Preparation

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Biology - 12th Class Biology Chapter 22 Short Questions Preparation

Question # 1

Define polygenic Inheritance.Give example.

  • Ans 1: Polygenic inheritance is that which is controlled by more than two pairs of gene are called polyegneic traits.For example wheat grain color,human eye and skin color.
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Prepare Complete Set Wise Questions For Chapter 8 "12th Class Biology Chapter 22 Short Questions Preparation "

12th Class Biology Chapter 22 Short Questions Preparation - Set 1

Question # 1

Define polygenic Inheritance.Give example.

  • Ans 1: Polygenic inheritance is that which is controlled by more than two pairs of gene are called polyegneic traits.For example wheat grain color,human eye and skin color.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 2

Question # 1

What is test cross?Who devised it?

  • Ans 1: Mendel devised test cross.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 3

Question # 1

What are sex limited traits?Give an example.

  • Ans 1: Sex limited traits are present only in one sex due to anatomical differences.Such trait affects a structure or function of the body present in only males or only females.For example genes for milk yield in dairy cattle affect only cows.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 4

Question # 1

Differentiate between dominant and recessive traits.

  • Ans 1: Dominant trait: They trait which is controlled by dominant gene or allele us called dominant trait.
  • Ans 2: Recessive trait: The trait which is controlled by recessive gene or allele is called recessive trait.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 5

Question # 1

Differentiate between homozygous and heterozygous.

  • Ans 1: Homozygous: If alleles of a gene pair are in similar from they are called homozygous.
  • Ans 2: Heterozygous: If the alleles of a gene pair are in different from they are called heterozygous.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 6

Question # 1

Define pleiotropy. Give two examples.

  • Ans 1: When a gene more than one trait it is called pleiotropy. For example gene for eye colour in Drosophila also controls shape of spermathecae.
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12th Class Biology Chapter 22 Short Questions

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