All Free Agriculture MCQs with Answers
Every Agriculture question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
2,315 questions · page 71 of 116
- A. Monoploid
- B. Diploid
- C. Tetraploid
- D. Triploid
Explanation: Commercial seedless watermelons are usually triploid, produced by crossing tetraploid plants with diploid plants.
Correct answer: Triploid- A. Self pollinated crops
- B. Cross pollinated crops
- C. Vegetative propagated crops
- D. Often cross pollinated crops
Explanation: Mutation breeding is especially useful in self-pollinated crops because a useful mutation can be fixed and maintained through subsequent…
Correct answer: Self pollinated crops- A. Mitosis
- B. Meiosis
- C. Amitosis
- D. all the above
Explanation: Synapsis is the pairing of homologous chromosomes during prophase I of meiosis. It does not occur in ordinary mitosis or amitosis.
Correct answer: Meiosis- A. Hardy (1908)
- B. Ford (1940)
- C. Muller (1950)
- D. Satisbury (1940)
Explanation: J. B. S. Haldane introduced the idea of genetic load, but the term is commonly credited in such MCQs to H. J. Muller in 1950.
Correct answer: Muller (1950)- A. Heterostyle
- B. Dichotamy
- C. Dichogamy
- D. Heterospory
Explanation: Dichogamy is the condition in which anthers and stigmas mature at different times in the same flower, reducing self-pollination.
Correct answer: Dichogamy- A. 100 meters
- B. 50 meters
- C. 200 meters
- D. 3 meters
Explanation: Bhindi is cross-pollinated by insects, so seed crops require substantial isolation to prevent unwanted pollen contamination.
Correct answer: 200 meters- A. Switzerland
- B. USA
- C. Den nark
- D. Thailand
Explanation: UPOV, the Union for the Protection of New Varieties of Plants, has its headquarters in Geneva, Switzerland.
Correct answer: Switzerland- A. Wheat
- B. Sorghum
- C. Rice
- D. Maize
Explanation: Dee-Geo-Woo-Gen is a dwarfing donor in rice breeding and contributed genes used in semidwarf rice varieties.
Correct answer: Rice- A. Oat
- B. Rice
- C. Barley
- D. Wheat
Explanation: Norin 10 is a Japanese dwarf wheat variety that donated important reduced-height genes used in modern wheat breeding.
Correct answer: Wheat- A. Donald (1968)Access Government Careers
- B. Finlay (1968)
- C. Rasmesson (1987)
- D. Jennings (1958)
Explanation: The term ideotype was coined by C. M. Donald in 1968 for an ideal plant type designed to achieve a specified production goal.
Correct answer: Donald (1968)Access Government Careers- A. Oat
- B. Linseed
- C. Gram
- D. Tomato
Explanation: Flor developed the gene-for-gene concept while studying flax resistance to flax rust.
Correct answer: Linseed1412. A mutation which kills 50% of the individual that carry the mutation is known as_________________?
- A. Lethal mutation
- B. Sub-vital mutation
- C. Vital mutation
- D. Sub lethal mutation
Explanation: A sublethal mutation kills about half of the individuals carrying it, whereas a fully lethal mutation kills all carriers under the…
Correct answer: Sub lethal mutation- A. Barley
- B. Maize
- C. Wheat
- D. Oat
Explanation: Stadler pioneered the use of X-rays to induce mutations in barley, helping establish mutation breeding as a practical breeding method.
Correct answer: Barley- A. Isochromosome
- B. Normal chromosome
- C. Traits located chromosome
- D. None of the aboveAccess Government Careers
Explanation: A primary trisomic carries one additional complete, normal chromosome, giving a chromosome number of 2n+1.
Correct answer: Normal chromosome1415. The change in chromosome number which involves the entire set of genome is known as______________?
- A. Anenploidy
- B. Trisomy
- C. Euploidy
- D. all the above
Explanation: Euploidy is a chromosome-number change involving complete sets of chromosomes, such as haploidy or polyploidy.
Correct answer: Euploidy- A. 2n-2
- B. 2n+1
- C. 2n-1
- D. 2n+2
Explanation: Nullisomy means that both copies of one homologous chromosome are missing, so its formula is 2n−2.
Correct answer: 2n-2- A. Apomixis
- B. All the above
- C. Asexual reproduction
- D. Polyploidy
Explanation: Heterosis can be maintained across generations through apomixis or other asexual reproduction, while polyploidy may also help preserve…
Correct answer: All the above- A. Composites
- B. Multi lines
- C. Hybrids
- D. Synthetics
Explanation: Hybrids are produced by crossing selected inbred or genetically distinct parents, so they express heterosis directly in the F1 generation.
Correct answer: Hybrids- A. Simmonds (1979)
- B. East (1908)
- C. Davenport (1908)
- D. Davis (1927)
Explanation: Davis proposed the top-cross method in 1927 to evaluate the combining ability of inbred lines by crossing them with a common tester.
Correct answer: Davis (1927)- A. Richey (1914)
- B. Meredith and Bridge (1972)
- C. Jenkins (1935)
- D. Hull (1950)
Explanation: Meredith and Bridge used the term useful heterosis in 1972 for hybrid superiority that has practical value in crop production.
Correct answer: Meredith and Bridge (1972)