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

What are sex influenced traits?Give an example.

  • Ans 1: Sex influencing traits occurs in both males and females but more common in one sex.It is controlled by an allele that is dominant in one sex but recessive in other.The difference in expression is due hormonal difference in two sexes.E.g, patteren baldness is sex influenced trait.
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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

What are sex influenced traits?Give an example.

  • Ans 1: Sex influencing traits occurs in both males and females but more common in one sex.It is controlled by an allele that is dominant in one sex but recessive in other.The difference in expression is due hormonal difference in two sexes.E.g, patteren baldness is sex influenced trait.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 2

Question # 1

Differentiate between autosome and sex chromosomes.

  • Ans 1: Autosome chromosomes: Chromosomes which do not contain genes for sex determination or chromosomes other than sex chromosomes are called autosomes.
  • Ans 2: Sex chromosomes: Chromosomes which play role in sex determination are called sex chromosomes.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 3

Question # 1

What is the product rule?

  • Ans 1: When two independent events are occurring simultaneously like in dihybrid cross,the ratio of each joint phenotypic combination can be obtained by multiplying the probabilities of individual phenotypes. It is called product rule.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 4

Question # 1

What do you known about protanopia and tritanopia?

  • Ans 1: Protonopia is red colour blindness while tritonopia is blue color blindness.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 5

Question # 1

Differentiate between continuous and discontinuous variations.

  • Ans 1: Continuous variations: In Continuous variations many intermediate forms of a trait are present and organism show very small difference for a trait.For example skin color,eye color.
  • Ans 2: Discontinuous variations: In discontinuous variations very sharp difference is present and no intermediate forms are present for a trait.For example tongue rolling,attached or free pinna.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 6

Question # 1

What do you know about co-dominance?

  • Ans 1: Different alleles of a gene that are both expressed in a heterozygous condition is called co-dominance.
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12th Class Biology Chapter 22 Short Questions

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