OJEE Principles of Inheritance and Variation — practice questions
42 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice OJEE Principles of Inheritance and Variation in the app →Mendel conducted his hybridisation experiments on which plant?Mendel selected pea plants with how many pairs of contrasting traits?In Mendel's monohybrid cross between true-breeding tall (TT) and dwarf (tt) plants, the F₂ phenotypic ratio waThe F₂ **genotypic** ratio in Mendel's monohybrid cross is:A test cross in Mendelian genetics is performed by crossing an organism with the dominant phenotype with:The Punnett square is used to:Mendel's Law of Segregation states that:Mendel's Law of Independent Assortment is best illustrated by the F₂ phenotypic ratio of:Mendel's Law of Independent Assortment applies only when:
In In ABO blood grouping, the I^A and I^B alleles are:The ABO blood-group gene (I) has how many alleles in the human population?A person with blood group AB has the genotype:A person with blood group O has the genotype:Thomas Hunt Morgan used which model organism for his genetic studies?In Morgan's data, the genes white and yellow showed only 1.3% recombination, while white and miniature wing shWhich of the following is a characteristic of polygenic inheritance?In humans, the sex-determination mechanism is:In grasshopper, the sex-determination mechanism is:In birds, the sex-determination mechanism is:The probability of giving birth to a male or female child in humans is:Sickle-cell anaemia is caused by:Which of the following is a mutagen?Sickle-cell anaemia is a:Thalassemia differs from sickle-cell anaemia in that:β-Thalassemia is controlled by which gene?Down's syndrome is caused by:Klinefelter's syndrome is characterised by the karyotype:Turner's syndrome results from the karyotype:Aneuploidy refers to:Polyploidy refers to:In a monohybrid cross Tt × Tt, the phenotypic ratio in F2 is:Genotypic ratio of a monohybrid F2 (Tt × Tt):Phenotypic ratio in dihybrid F2 cross (RrYy × RrYy):ABO blood groups: an individual with genotype I^A i has blood type:Refer to the Punnett square shown for monohybrid cross:
 is dominant over blue (b). Bb father × bb mother. Probability of blue-eyed child:In a pedigree, a horizontal line connecting two individuals represents:Pleiotropy refers to:4 O'clock plant flower color shows incomplete dominance: RR (red) × rr (white) → Rr (pink). F2 phenotypic ratiLinkage map distance of 1 cM (centimorgan) corresponds to: