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. Select the correct statement from the ones given below with respect to dihybrid cross.








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    Linkage is the inheritance of genes of same chromosome together and capacity of these genes to retain their parental combination in subsequent generation. The strength of linkage between two genes is inversely proportional to the distance between the two. This means, two linked genes show higher frequency of recombination if the distance between them is higher and lower frequency if the distance is smaller.

    Correct Option: D

    Linkage is the inheritance of genes of same chromosome together and capacity of these genes to retain their parental combination in subsequent generation. The strength of linkage between two genes is inversely proportional to the distance between the two. This means, two linked genes show higher frequency of recombination if the distance between them is higher and lower frequency if the distance is smaller.

  1. A common test to find the genotype of a hybrid is by








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    crossing of one F1 progeny with male parent. e.g

    To find the genotype of hybrid test cross is done.

    Correct Option: C

    crossing of one F1 progeny with male parent. e.g

    To find the genotype of hybrid test cross is done.

  1. A human male produces sperms with the genotypes AB, Ab, aB, and ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of this person?








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    Correct Option: D


  1. In Mendel’s experiment with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY × rryy?








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    So the ratio of round seeded with yellow cotyledons: Round seeded green cotyledons: Wrinkled seeded yellow cotyledons: Wrinkle seeded green cotyledons in 9: 3: 3: 1. So in the F2 generation the round seeded character remains with yellow cotyledons & wrinkled seeds with yellow cotyledons.

    Correct Option: C


    So the ratio of round seeded with yellow cotyledons: Round seeded green cotyledons: Wrinkled seeded yellow cotyledons: Wrinkle seeded green cotyledons in 9: 3: 3: 1. So in the F2 generation the round seeded character remains with yellow cotyledons & wrinkled seeds with yellow cotyledons.

  1. Which one of the following is an example of polygenic inheritance?








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    Polygenic inheritance is the inheritance of traits which are dependent on the no. of genes such as the skin colour of human beings. eg. AABB is black AaBB in neither dark nor black. AaBb is again wheatish Aabb is light and aabb is white colour.

    Correct Option: C

    Polygenic inheritance is the inheritance of traits which are dependent on the no. of genes such as the skin colour of human beings. eg. AABB is black AaBB in neither dark nor black. AaBb is again wheatish Aabb is light and aabb is white colour.