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

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Biology - 12th Class Biology Chapter 22 Short Questions Preparation

Question # 1

Give significance of test cross.

  • Ans 1: Mendel devised a cross called test cross,which is used to test the genotype of an individual showing a dominant phenotype.This cross finds out the homozygous or heterozygous nature of the genotype.
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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

Give significance of test cross.

  • Ans 1: Mendel devised a cross called test cross,which is used to test the genotype of an individual showing a dominant phenotype.This cross finds out the homozygous or heterozygous nature of the genotype.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 2

Question # 1

Differentiate between tritanopia and deutranopia.

  • Ans 1: Tritanopia: Tritanopia is blue colour blindness.
  • Ans 2: Deuteranopia: Deuteronopia is green blindness.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 3

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 4

Question # 1

Differentiate between multiple alleles and polygenes..

  • Ans 1: Multiple alleles: If a gene has more than two alternate forms these are called multiple alleles.For example alleles for ABO blood group. E.g,alleles for ABO blood group.
  • Ans 2: Polygenes: When a continuously varying trait is controlled by alleles for two or more than two different gene pairs found at different loci,all influencing the same trait in an additive way,such genes are called polygenes, e.g,genes for controlling skin and eye colour in human.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 5

Question # 1

Two Normal parents have an albino child.What is the probability that their next child will also be an albino?

  • Ans 1: 3 of their sons will be normal and one will be albino that is the ratio is
    Normal : Albino
    3 1
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12th Class Biology Chapter 22 Short Questions Preparation - Set 6

Question # 1

What is type II diabetes or NIDDM?

  • Ans 1: Type II diabetes or NIDDM.It account for 90% of all diabetic patients.These person produce some endogenous insulin themselves,but their body cells fail to respond to insulin and cannot take up glucose from body.They develop some sort of insulin resistance.
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22th Chapter

12th Class Biology Chapter 22 Short Questions

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