CHSE Biology Heredity and Variation (Genetics) previous 10-year questions

Chapter- Heredity and Variation (Genetics)

One mark questions:-

  1. Monohybrid cross yields ______ numbers of genotype. (CHSE – 2014)
  2. The term ‘gene’ was coined by _____ in the year 1909. (CHSE – 2015)
  3. In a cross between red and white flowered plants, F1 hybrids are pink. This is called ______ dominance. (CHSE – 2016)
  4. _______ coined the term ‘gene’ for Mendelian factor. (CHSE – 2017)
  5. If allele for tallness (TT) is dominant and dwarfness (tt) is recessive, then in a cross between ________, 50% of the offspring will be dwarf. (CHSE – 2018)
    • TT x tt
    • Tt x tt
    • tt x tt
    • Tt x Tt
  6. The phenomenon of single gene contributing to multiple phenotypic traits is called _______. (CHSE – 2019)
    • pleiotropy
    • codominance
    • incomplete dominance
    • polygenic inheritance
  7. Mutation that completely eliminates a gene is called ________ mutation. (CHSE – 2019)

Short notes / short answer type questions and differentiates: -

  1. Multiple allelism (CHSE – 2012)
  2. Backcross and testcross (CHSE – 2013)
  3. Mendel's principle of dominance (CHSE – 2014)
  4. Hybrids and cybrids (differentiate) (CHSE – 2014)
  5. Quantitative inheritance (CHSE – 2015)
  6. Monohybrid cross and dihybrid cross (Differentiate) (CHSE – 2016)
  7. Law of segregation (CHSE – 2017)
  8. Hybridization (CHSE – 2017)
  9. Cybrid and hybrid (Differentiate) (CHSE – 2017)
  10. Codominance (CHSE – 2018)

Long questions: -

  1. Explains Mendel’s dihybrid cross with a chequerboard.
  2. Discuss Mendel’s dihybrid cross with checkerboard. (CHSE – 2018)

1 Comments

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Chinu

Thank you di 🙇

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