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

  • Total Questions10

  • Available Sets6

Start Test Download PDF

Biology - 12th Class Biology Chapter 22 Short Questions Preparation

Question # 1

What is epistasis?Ho it differs from dominance?

  • Ans 1: Epistasis: An effect caused by a gene or gene pair at one locus interferes with or hides the effect caused by another gene or gene pair at another locus,such a phenomenon of gene interaction is called epistasis.
    Epistasis must not be confused with dominance.
  • Ans 2: Dominance: Dominance is the relationship between alleles of the same gene occupying the same locus,but epistasis is the interaction between different genes occupying different loci.
Submit

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 is epistasis?Ho it differs from dominance?

  • Ans 1: Epistasis: An effect caused by a gene or gene pair at one locus interferes with or hides the effect caused by another gene or gene pair at another locus,such a phenomenon of gene interaction is called epistasis.
    Epistasis must not be confused with dominance.
  • Ans 2: Dominance: Dominance is the relationship between alleles of the same gene occupying the same locus,but epistasis is the interaction between different genes occupying different loci.
Submit

12th Class Biology Chapter 22 Short Questions Preparation - Set 2

Question # 1

Differentiate between monohybrid and dihybrid cross.

  • Ans 1: Monohybrid: A cross between two organisms which differ only in one character is called monohybrid cross.
  • Ans 2: Dihybrid: A cross between two organisms which differ only in two character is called dihybrid.
Submit

12th Class Biology Chapter 22 Short Questions Preparation - Set 3

Question # 1

What is contribution of Carl Correns in genetics?

  • Ans 1: Carl Correns discovered the phenomenon of incomplete dominance.
    He crossed red flowered 4 O clock plant with while flowered 4 O clock plant.In f1pink flowers were produced instead of red color was dominant.He again crossed pink flowers from F1,in F2 red,pink white flowers obtained with ratio 1:2:1 respectively.
Submit

12th Class Biology Chapter 22 Short Questions Preparation - Set 4

Question # 1

Define co-dominance.

  • Ans 1: Different alleles of a gene that are both expressed in a heterozygous condition are called co-dominance e.g MN blood group system.
Submit

12th Class Biology Chapter 22 Short Questions Preparation - Set 5

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.
Submit

12th Class Biology Chapter 22 Short Questions Preparation - Set 6

Question # 1

Compare between epistasis and poleiotropy.

  • Ans 1: Epistasis: When an effect caused by a gene pair on one locus interferes with or hides the effect caused by another gene or gene pair at another locus,it is called epistasis.
  • Ans 2: Poleiotropy: When a single gene affects two of more traits,the phenomenon is called pleiotropy.
Submit

ic-science-white
Biology
22th Chapter

12th Class Biology Chapter 22 Short Questions

Here you can prepare 12th Class Biology Chapter 22 (Variation and Genetics). Click the button for 100% free full practice.

Start Chapter 22 Preparation

Is this page helpful?