0% 20 Plant Breeding & Genetics Quiz 2 1 / 50 The diameter of mitochondria is __________________? 1-4 micron 40-70 micron 2-4 micron 0.5-2 micron 2 / 50 The geometrical device that helps in visnalizing all the possible combinations of male and female gametes known as____________________? Bateson square Punneu square Morgan square Mendel square 3 / 50 In wheat, example of durable insect resistance includes resistance to___________________? Stem saw fly Hessian fly Green bugs All the above 4 / 50 Which one of the following does not contain both DNA and RNA__________________? Bacterium Fungus Virus Algae 5 / 50 Amphimixis refers to_______________________? None of the above Asexual reproduction Sexual reproduction Apomixes 6 / 50 Evolution proceed on account of____________________? Fossils Adaptations through genervation Conversion pf organism to change of environment Struggle for existence 7 / 50 Development of embryo from egg cell without fertilization is known as___________________? Autogamy Parthenogenesis Apospory Apogamy 8 / 50 Nobel prize for the discovery of operon model was awarded to__________________? Watson and Crick (1953) Crick (1966) Briuen and Davidson (1959) Jacob and monod (1965) 9 / 50 Concept of disruptive selection was first developed by__________________? Falconer (1960) Grafius (1965) Mather (9153) Thoday (1960) 10 / 50 In potato food is stored in__________________? Flowers Shoot Leaves Root 11 / 50 Gene pool consist of____________________? Modern cultivars Land race Advanced breeding materials All the above 12 / 50 Convergent improvement was proposed by________________? Hays (1919) East (1920) Richy (1920) Jones (1920) 13 / 50 The term micro and macro environment was given by___________________? Comstock and Moll (1963) Perkins (1971) Robinson (1948) Lemer (1954) 14 / 50 Many groups of insects have developed resistance to DDT and other insecticides as a result of____________________? Segregation Crossing over Gene mutation Polyploidy 15 / 50 The crossing of a yomozygous tall plant and a homozygous dwarf plant would yield plants in the ratio of_________________? 2 tall: 2 dwarf All homozygous dwarf All the heterozygous tall One homozygous tall, one homozygous dwarf, two heterozygous tall 16 / 50 The offspring of a cross between twp individuals differing in at least one set of characters is called__________________? Variant Hybrid Mutant Polyploidy 17 / 50 A heterogeneous population include_______________? Synthetic Multi lines Composites All the above 18 / 50 The first attempt to show linkage in plants were done in____________________? Another Lamarckian Possum sativa Lathers odorous Zeal Mays 19 / 50 Pedigree selection is used in____________________? Cross pollinated plants For crosses at intervener level Self pollinated plants Plant difficult to hybridized 20 / 50 RELP?s, RAPD are helpful in________________? Gene sequencing All the above Identify new genes Gene mapping 21 / 50 Continuous variation are attrions are attributed to____________________? Linkage Mutations Crossingover Polyploidy 22 / 50 Which feature is not found in all living beings____________________? Some triplet code for amino acids Protein synthesis in ribosome?s Types of protein occurring in the body Energy storage in high high energy phosphate bonds 23 / 50 Cuscuta is an object ional weed of_____________________? Luceru Berseem Sorghum Cowpeas 24 / 50 Pure line theory was developed by_______________? Thoday (1960) Mather (1951) Johannsen (1903) Allard (1957) 25 / 50 Mating between distantly related individuals is known as________________? Out breeding Amphimixis Inbreeding All the above 26 / 50 In cotton, jassids have non preference for______________________? Fregobract Hairiness of leaves Smoothness leaves Okra leaves 27 / 50 A cross of unlike organisms is termed as____________________? None of the above Backcross Hybrid Heterosis 28 / 50 One of the persons whose evolutionary ideas were close to that of Laraarcd was____________________? H be vnes Vavilow Weismann Lysendo 29 / 50 Increased flower size has made tetraploidy important for___________________? Plant breeder Pathologist Agronomist Horticulturist 30 / 50 Maximum vegetable crops belong to the family____________________? Solanaceae Cucurbitaceae Legumunaceae Cruciferae 31 / 50 Rice flowers have___________________? Four stamens Eight stamens None of the above Six stamens 32 / 50 In allogamous species, a true breeding line obtained by continuous inbreeding is__________________? Poly cross Inbred Top cross Hybrid 33 / 50 Maximum mutants varieties are evolved in_________________? Rice Barley Wheat Maize 34 / 50 When a cell with 40 chromosomes undergoes meiosis each of the four resulting cells has_____________________? 20 chromosomes None 10 chromosomes 40 chromosomes 35 / 50 Global gene pool rice is maintained at_________________? Mexico None of the above China IRRI Philippines 36 / 50 Under drought conditions, there is an increase in__________________? All the above Abscisic acid Pro line level Ethylene level 37 / 50 Apheliotropic gene is one which___________________? Affects only one character Affects more than one character Affects more than ten characters Affects more than five characters 38 / 50 Cytoplasm fills of the cavity of a cell when if is young. But in nature cells, the cytoplasm________________? Disintegrates partially Contracts Becomes vacuolated Disappears completely 39 / 50 An auxotroph is_________________? A mutant organism which has lost its ability to synthesize one or more essential nutrients A plan that is able to synthesize its own carbohydrates An organism that depends on other organism for meting its nutrient requirements non of these 40 / 50 The first organisms to appear on the earth were more like plants than animals because__________________? Plants can manufacture their own food material There are more plants than animals None of the above Plants are similar in structure 41 / 50 If the leaf cells have eight chromosomes it is mostly likely that__________________? Gametes will have 4 chromosomes Zygote will have 16 chromosomes Zygote will have 4 chromosomes Gametes will have 8 chromosomes 42 / 50 Heterosis can be fixed by___________________? All the above Asexual reproduction Apomixis Polyploidy 43 / 50 Prescribed germination percentage of foundation seed of groundnut____________________? 70 95 90 20 44 / 50 The genetic constitution of an orgarusm is denoted by____________________? Genome Phenotype Genotype Allele 45 / 50 Gametophytic self incompatibility was first reported in___________________? Scale cereals Set aria sphacelata Nicotine sandarac Lena sativa 46 / 50 Concept of ideotype was coined by__________________? Oat Rice Wheat Sorghum 47 / 50 The reason why mutations which are harmful do not eliminated from gene pool is that___________________? They are recessive and carried by heterozygous individuals Making possible reproduction in all types of environments Genetic drift occurs because of a small population in to offsprings They have future survival value 48 / 50 Duplication of chromosomes occurs during_________________? Meiosis Mitosis only None of the above Mitosis and meiosis 49 / 50 After self pollination of red flowered plants out of 40 plants of progeny were white flowered. this indicates that the plants are__________________? Homogenous Homozygous Heterozygous Heterogeneous 50 / 50 Germplasm gene banks for different crop plants in world are about_____________________? 1080 1200 1100 980 Provide Your Information Your score is The average score is 59% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevPlant Breeding & Genetics Quiz 1 Plant Breeding & Genetics Quiz 3Next
