Principles of Inheritance and Variation

Principles of Inheritance and Variation

Easy Questions

Advanced Botany

Plant Growth and Development
Organisms and Populations
Ecosystem
Biodiversity and Conservation
Environmental Issues
Microbes in Human Welfare
Strategies for Enhancement in Food Production
Molecular Basis of Inheritance
Principles of Inheritance and Variation
Sexual Reproduction in Flowering Plants
Reproduction in Organisms
The Living World
Respiration in Plants
Photosynthesis
Mineral Nutrition
Transport in Plants
Cell Cycle and Cell Division
Cell-The Unit of Life
Anatomy of Flowering Plants
Morphology of Flowering Plants
Plant Kingdom
Biological Classification
  1. A polygenic inheritance in human beings is








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    Polygenic inheritance show cumulative effect i.e. two independent dominant genes produce additive effect on an individual.

    Correct Option: A

    Polygenic inheritance show cumulative effect i.e. two independent dominant genes produce additive effect on an individual.

  1. Mendel studied inheritance of seven pairs of traits in Pea which can have 21 possible combinations. If you are told that in one of these combinations, independent assortment is not observed in later studies, your reaction will be








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    Law of independent assortment is applicable to only those factors or genes which are located on different chromosomes. Probably the characters were present on same chromosome and showed linkage which Mendel might not have studied.

    Correct Option: B

    Law of independent assortment is applicable to only those factors or genes which are located on different chromosomes. Probably the characters were present on same chromosome and showed linkage which Mendel might not have studied.

  1. A child of blood group O can not have parents of blood groups








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    AB blood group possess the genotype IAIB. The alleles IA and IB are codominant as both express themselves when together in an individual.

    Correct Option: A

    AB blood group possess the genotype IAIB. The alleles IA and IB are codominant as both express themselves when together in an individual.

  1. Two dominant nonallelic genes are 50 map units apart. The linkage is








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    Chromosome mapping is based on the fact that genes are linearly arranged on the chromosome and frequency of crossing over is directly proportional to the distance between two genes. Dominant genes show cis arrangement. At 50 map units cis is changed to trans & vice-versa hence no fixed linkage is present.

    Correct Option: D

    Chromosome mapping is based on the fact that genes are linearly arranged on the chromosome and frequency of crossing over is directly proportional to the distance between two genes. Dominant genes show cis arrangement. At 50 map units cis is changed to trans & vice-versa hence no fixed linkage is present.

  1. In a dihybrid cross AABB × aabb, F2 progeny of AABB, AABb, AaBB and AaBb occurs in the ratio of








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    Genotype is the genetic make up of an organism. The given 4 genotypes are present in 1: 2: 2: 4 ratio.

    Correct Option: D

    Genotype is the genetic make up of an organism. The given 4 genotypes are present in 1: 2: 2: 4 ratio.