In spermatogenesis, each spermatogonium grows in size to become what?
Correct answer C. Spermatocyte
Topic / 399 questions
Plant Breeding and Genetics MCQs
Plant Breeding and Genetics MCQs are multiple-choice questions on how traits are inherited in plants and how breeders use that knowledge to develop better crop varieties. They help agriculture students and candidates for Agriculture Officer, lecturer and ICAR AIEEA exams. Each question displays its correct answer instantly, so you can test genetics concepts and breeding methods efficiently.
In which crop has autopolyploidy been exploited successfully?
Correct answer A. Sugar beet
What information does line x tester analysis provide?
Correct answer D. All of these
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In a line × tester cross, between which parents is mating done?
Correct answer B. Males and females
What acts as the template for translation?
Correct answer A. mRNA
What is a leaf without a petiole called?
Correct answer B. Sessile
What is the earliest method of plant breeding?
Correct answer C. Selection
What controls self-incompatibility?
Correct answer A. Multiple alleles
Male sterility is the absence of what?
Correct answer B. Functional pollen
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What type of trait is colour blindness?
Correct answer B. Sex-linked trait
Where is the centre of origin of the sunflower?
Correct answer B. North America
What is the sunflower seed called botanically?
Correct answer B. Achene
What is the sexual condition of the disc florets of sunflower?
Correct answer D. Bisexual
What are the ray florets of sunflower usually?
Correct answer C. Sterile
What is the oil content of sunflower seed?
Correct answer C. 25-35%
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Which one of the following is not a cereal crop?
Correct answer C. Sorghum
Which statement about etiolation and albinism is true?
Correct answer C. Etiolation is physiological while albinism is genetic
Which cellular structure always disappears during mitosis?
Correct answer A. Nuclear membrane
What is the diameter of a mitochondrion?
Correct answer D. 0.5-2 microns
Which cell organelle is rich in catabolic enzymes?
Correct answer A. Lysosome
About Plant Breeding and Genetics MCQs
The genetics side of this category covers nucleic acids, ribosomes, genes and the units of crossing over and recombination, along with sex-linked traits such as colour blindness. Questions also test basic biology terms, for example autotrophs that build all their substances from simple inorganic molecules, and cell processes that underpin inheritance. These foundations are essential before tackling applied breeding questions.
Breeding topics include self-incompatibility and its genetic control, male sterility, protandry and other floral mechanisms that encourage cross-pollination, gene banks and germplasm conservation, and the major crop families used in vegetable production. Understanding these mechanisms explains how hybrids are produced commercially. Recruitment tests for plant breeders and agriculture lecturers rely heavily on such definitions, so regular practice builds speed and accuracy.
Key facts to remember
- Male sterility is the absence of functional pollen while the female organs remain fertile.
- Self-incompatibility in plants is controlled by a series of alleles at the S locus.
- Protandry means the anthers mature and shed pollen before the stigma becomes receptive.
- Ribosomes are the sites of protein synthesis in the cell.
- Colour blindness in humans is an X-linked recessive trait.
Exams that include Plant Breeding and Genetics MCQs
Pakistan
- PPSC
- FPSC
- SPSC
- KPPSC
- Lecturer tests
- NTS
India
- ICAR AIEEA
- UGC NET
- State PSC exams
Bangladesh
- BCS
- Government job tests
- University admission tests (DU, RU, JU)
How to prepare for Plant Breeding and Genetics MCQs
- Make a chart of pollination control mechanisms, including protandry, protogyny, self-incompatibility and male sterility, with one crop example for each.
- Practise simple Mendelian ratios such as 3:1 and 9:3:3:1 until you can identify them instantly in options.
- Note the difference between gametophytic and sporophytic self-incompatibility, since examiners often ask which pollen genotype is rejected.
- Revise germplasm terms like gene bank, landrace and wild relative, because conservation questions are common in breeding papers.
Frequently asked questions
What are the most important topics in Plant Breeding and Genetics MCQs?
Focus on Mendelian inheritance, linkage and crossing over, DNA and protein synthesis, mutation, polyploidy, self-incompatibility, male sterility and hybrid seed production. Breeding methods such as pure line selection, mass selection, pedigree and backcross breeding are also tested, along with germplasm conservation and the centres of origin of crops.
How many Plant Breeding and Genetics MCQs are on MCQs360?
MCQs360 has 402 Plant Breeding and Genetics MCQs, each with an instant answer. You can practise them free and without signing up, which lets you combine genetics revision with related agriculture categories such as agronomy and soil science.
Which exams include Plant Breeding and Genetics MCQs?
These questions appear in Agriculture Officer, Plant Breeder and Research Officer posts advertised by PPSC, FPSC, SPSC and KPPSC, and in agriculture lecturer tests. In India they are part of ICAR AIEEA and UGC NET, and in Bangladesh they appear in BCS agriculture cadre exams and university admission tests for agriculture programmes.
Why is male sterility useful in plant breeding?
Male sterility is useful because the plant cannot produce functional pollen, so it cannot self-pollinate. Breeders can use it as a female parent and let pollen from another line fertilise it, producing hybrid seed without removing anthers by hand. This saves labour and makes large-scale hybrid seed production practical in crops such as maize, rice and sunflower.
Last reviewed October 2026