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

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Biology - 12th Class Biology Chapter 22 Short Questions Preparation

Question # 1

What is Bombay Phenotype?

  • Ans 1: When in an individuals RBCs lack A and B antigens although the do not contain Ia and Ib genes.They are phenotypically like O blood group but are not genotypically like O.Their phenotype is called Bombay phenotype.
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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 is Bombay Phenotype?

  • Ans 1: When in an individuals RBCs lack A and B antigens although the do not contain Ia and Ib genes.They are phenotypically like O blood group but are not genotypically like O.Their phenotype is called Bombay phenotype.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 2

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 3

Question # 1

State Law of independent assortment.

  • Ans 1: When two contrasting pairs of traits are followed in the same cross,their alleles are assorted independently into gametes.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 4

Question # 1

Define incomplete dominance,Give example

  • Ans 1: When the phenotype of the heterozygote is intermediate between phenotypes of the two homozygotes,it is called incomplete dominance.
    Example: flower colouring in 4'0 clock plant.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 5

Question # 1

Differentiate between population & gene pool.

  • Ans 1: Population: Any group of interbreeding organisms of the same species that exist together in both time and space is called a population.e.g 100 diploid plants of pea in a field is an example of population.
  • Ans 2: Gene pool: All the genes or alleles found in a breeding population at a given time are collectively called the gene pool.e.g pea plants has white colors.There will be 100 genes(or 200 alleles) for flower color in gene pool.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 6

Question # 1

How sex is determined in plants?

  • Ans 1: Plants show a variety of sexual situations.Some species like Ginkgo are dio-ecious having plants of separate sexes.Male plants produce flower with only stamens and female plants produce flower with only carpels.Some dioecious plants have a difference of sex chromosome between the sexes.These have an X-Y system.These plants typically exhibit an X-choromosome autosome balance system for sex determination.
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12th Class Biology Chapter 22 Short Questions

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