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

Chapter- Molecular Basis of Inheritance 

One mark questions:-

1. _____ is the initiation codon. (CHSE – 2012)
2. RNA does not have _____ as a nitrogenous base. (CHSE – 2013)
3. The initiation codon AUG normally codes for formylated _______. (CHSE – 2014)
4. To form a continuous DNA molecule, the enzyme ______ joints Okazaki fragments. (CHSE – 2015)
   • Primase
   • Polymerase
   • Helicase
   • Ligase
5. _______ coined the term ‘gene’ for Mendelian factor. (CHSE – 2017)
6. The complementary base of adenine in RNA molecule is _____. (CHSE – 2018)
7. The example of start codon is _____. (CHSE – 2019)
   • UAA
   • UGA
   • UAG
   • AUG
8. Mutation that completely eliminates a gene is called _____ mutation. (CHSE &ndash

Health and disease chapter is the most important chapter for the CHSE Odisha Biology board exam. It is the most important chapter for one-mark questions, short notes or, short answer type questions and differentiates.

First, see the new syllabus and then practice these questions. Because 2010 to 2017 board exams were held as per the old CHSE syllabus.

One Mark Questions:-

1. Name the parasite blocking the lymphatics in human and name the disease caused by this parasite. (CHSE – 2010)
2. Name the cell in the human body destroyed by HIV. (CHSE – 2010)
3. Which tissue affected in sarcoma? (CHSE – 2010)
4. Which test is required to diagnose typhoid? (CHSE – 2011)
5. Which secretion is inhibited by alcohol? (CHSE – 2011)
   1. ADH
   2. Insulin
   3. Oxytocin
   4. Progesterone
6. Deficiency of which hormone causes diabetes? (CHSE – 20