UP Board Class 12 Principles of Inheritance and Variation — practice questions
23 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice UP Board Class 12 Principles of Inheritance and Variation in the app →In Mendel's monohybrid cross of tall × dwarf pea plants, the phenotypic ratio in the F₂ generation wasA tall pea plant is crossed with a dwarf plant. Half the offspring are tall and half are dwarf. The genotype oThe genotypic ratio in the F₂ of a monohybrid cross between Tt × Tt isA cross between true-breeding red (RR) and true-breeding white (rr) snapdragons gives pink F₁ plants. This patA person with blood group AB has genotypeThe ABO blood-group system is an example ofThe phenotypic ratio in the F₂ of a Mendelian dihybrid cross (with two independently assorting genes) isMendel's Law of Independent Assortment is best illustrated by the F₂ ratioMorgan's discovery of linkage in Drosophila showed thatIf two genes on the same chromosome show a recombination frequency of 1%, they are approximatelyA trait controlled by three or more genes whose effects add up, producing a continuous range of phenotypes, isIn humans, the sex of a child is determined at fertilisation byIn honey bees, drones (male bees) develop fromHaemophilia and colour blindness are inherited asMendel conducted his classic genetics experiments using:In a monohybrid cross of Tt × Tt, the F2 PHENOTYPIC ratio is:In a DIHYBRID cross of YyRr × YyRr, the F2 phenotypic ratio is:In snapdragon (Antirrhinum), RR (red) × rr (white) gives F1 plants that are PINK. This pattern is called:In the human ABO blood group system, a person with blood group AB has the genotype:The sex of a human baby is determined by:Sickle cell anaemia is caused by:Down syndrome is most commonly caused by:Haemophilia and colour blindness are MORE COMMON in MALES than females because they are: