Free Plant Breeding and Genetics MCQs with Answers

• A. Pollination
• B. All the above
• C. Self Pollination
• D. Cross Pollination

Explanation: Cross-pollination combines genetic material from different plants, producing variation that can improve adaptability and often hybrid…

• A. Biffen (1905)
• B. Flor (1956)
• C. Van der plank (1963)
• D. Painter (1951)

Explanation: Biffen reported the early genetic resistance of potato to late blight in 1905, associated with the R-gene concept later developed through…

• A. Auxins
• B. Cytokinins
• C. Gibberellins
• D. IAA

Explanation: Cytokinins promote cell division and also help regulate shoot formation and delay leaf senescence.

• A. Phototropism
• B. Photolysis
• C. Photoperiodism
• D. Photosynthesis

Explanation: Photoperiodism is the response of plants to the relative lengths of day and night, especially in relation to flowering.

• A. Allogamy
• B. Autogamy
• C. Polygamy
• D. Cleistogamy

Explanation: Allogamy is pollination between flowers on different plants of the same species.

• A. Karpocho (1810)
• B. Knight (1800)
• C. Jones (1917)
• D. none

Explanation: Thomas Andrew Knight carried out early artificial hybridization work in fruit crops around 1800, particularly in fruit-tree breeding.

• A. 2 D
• B. 2d
• C. ID
• D. Id

Explanation: Resistance to woolly apple aphid is generally described as being controlled by one dominant gene, often written as 1D in older MCQ…

• A. Jones (1917)
• B. Muller (1927)
• C. Fray (1966)
• D. Karpehenko (1927)

Explanation: Karpechenko produced the radish–cabbage hybrid Raphanobrassica in 1927 by chromosome doubling, which restored fertility in the otherwise…

• A. developed ovary after fertilization
• B. Transformed ovule after fertilization
• C. Developed egg after fertilization
• D. None of the above

Explanation: A seed develops from a fertilized ovule, while the ovary develops into the fruit.

• A. Promote seed maturation
• B. Enhance maturity in plants
• C. Promote flowering
• D. Initiate fertilization

Explanation: Vernalization is the induction or acceleration of flowering by exposing a plant or seed to a period of low temperature.

• A. Tag men
• B. Seed coat
• C. Axil
• D. Tesla

Explanation: The outer integument develops into the testa, or seed coat, while the inner integument forms the tegmen.

• A. Grape
• B. Orange
• C. Apple
• D. Mango

Explanation: Parthenogenesis or related seedless-fruit development is commonly associated with grape, producing seedless berries.

• A. 100 meters
• B. 50 meters
• C. 200 meters
• D. 3 metersSearch Public Records

Explanation: Okra foundation seed requires a 200-metre isolation distance to prevent unwanted cross-pollination and maintain genetic purity.

• A. Zerophytes
• B. Gymnosperm
• C. Bryophytes
• D. Angiosperm

Explanation: Angiosperms are highly evolved seed-producing plants whose seeds are enclosed within fruits.

• A. Both A & B
• B. Partually self pollination
• C. Partially cross pollination
• D. Cross pollination

Explanation: Okra is mainly self-pollinated but permits some natural cross-pollination, so it is described as partially self-pollinated.

• A. Self pollination
• B. Cross pollination
• C. Self fertilization
• D. Partial self fertilization

Explanation: Cauliflower is cross-pollinated because its self-incompatibility system prevents effective fertilization by its own pollen.

• A. Zygote formation
• B. Fertilization
• C. Gametogenesis
• D. REproduction

Explanation: Gametogenesis is the formation of gametes, including male pollen gametes and female egg cells, through specialized reproductive processes.

• A. Polygamy
• B. None of the above
• C. Homogamy
• D. Autogamy

Explanation: Autogamy is pollination in which pollen reaches the stigma of the same flower.

• A. Metaxenia
• B. Xenia
• C. Pollination
• D. None of the above

Explanation: Metaxenia is the effect of pollen or the developing male parent on maternal tissues such as the ovary wall or fruit.

• A. Allogamy
• B. Pollination
• C. Crossing
• D. Breeding

Explanation: Pollination is specifically the transfer of pollen from anther to stigma, whether by wind, insects, animals or another agent.