1) Population improvement is used: a. To accumulate deleterious alleles b. To maintain homozygosity c. To accumulate favourable alleles d. To increase heterozygosity
|
||||
2) Pototo and Jerusalem artichoke are example of: a. Rhizome b. Tuber c. Bulb d. Corn
|
||||
3) Probably the most useful measurable property in the soil -plant-air system is: a. Matric Potential b. Water Potential c. Osmotic Potential d. Redox Potential
|
||||
4) Progeny of a hybrid plant: a. Breds true b. Resembles maternal plant c. Resembles paternal plant d. Segregation
|
||||
5) Prop or still roots are found in: a. Acacia tree b. Tomato plant c. Mango tree d. Banyan tree
|
||||
6) Protoplasm is a: a. True solution b. Unsaturated solution c. Suspension d. Polyphonic colloidal system
|
||||
7) Pseudo-fertility may also occur late in the season as in: a. Tomato b. Tobacco c. Tapioca d. Tea
|
||||
8) Pure line is: a. The progeny of selfed heterozygous plant b. The progeny of selfed homozygous plant c. The progeny of vegetatively progagated plant d. The progeny of a nucleus seed
|
||||
9) Pureline selection is: a. A method of accumulating favourable alleles b. Used to improve cross-pollinated crops c. Used to improve self-pollinated crops d. Used in vegetatively propagated crops
|
||||
10) Quarantine is: a. The name of a plant b. The name of a character c. The process of observation of alien material d. None of the above
|
||||
11) Rainfall, temperature, light, wind and humidity are: a. Climatic factors b. Edaphic factors c. Biotic factors d. Topographic factors
|
||||
12) Random assortment of genes will occur if the gene are located on: a. Same chromosome b. Different chromosomes c. Sex chromosome d. Autosome
|
||||
13) Recessive lethal genes are carried in the: a. Heterogenous form b. Hetrozygous form c. Homozygous form d. Homogenous form
|
||||
14) Recurrent selection is mostly used in: a. Cross pollinated crops b. Self pollinated crops c. Vegetatively propagated crops d. Apomictic crop plants
|
||||
15) Reduction Division in micro-sporogenesis occurs when: a. Pollen mother cells are produced from & porocytes b. Sporocytes are produced c. Ovules are formed d. Four pollen grains are formed from a pollen mother cell
|
||||
16) Registered seed is directly produced from: a. Foundation seed b. Certified seed c. Breeder's seed d. All the above
|
||||
17) Replacement of purine by pyrimidine and vice-versa is known as: a. Transversion b. Transduction c. Translocation d. All the above
|
||||
18) Restorer gene is needed: a. To make a plant correct b. To bring fertility in male sterile plants c. To make a plant resistant d. To enhance the yield
|
||||
19) Rice varieties IR 20, IR 26 and IR 36 have shown better resistance to: a. Tungro b. Bacterial leaf blight c. Blast d. Brown plant hopper
|
||||
20) Root bear: a. Unicelluar hairs b. Multicellular hairs c. Both (a) & (b) d. None of the above
|
||||
21) Root has: a. Root cap b. Region of cell division c. Give proper anchorage to plant d. All of the above
|
||||
22) Secondary nucleus in the embryosac is: a. Hoplold b. Diploid c. Triploid d. Hexaploid
|
||||
23) Seeds of monocotyledons are: a. Albuminous or non-endospermic b. Ex-albuminous or non-endospermic c. Both (a) & (b) d. Neither (a) nor (b)
|
||||
24) Seeds of pea, gram and beans are: a. Albuminous or non-endospermic b. Ex-albuminous c. Both (a) & (b) d. None of the above
|
||||
25) Selfing of a plant increases: a. Heterozygosity b. Homozygosity c. Homogenecity d. Heterogenecity
|
||||
26) Sex in Drosophila is governed by the following mechanism: a. XY methods b. OX method c. ZZ method d. X autosomes ratio
|
||||
27) Single gene affecting more than one character is: a. Polymorphism b. Pleiotropy c. Phenocopy d. Complete penetrance
|
||||
28) Specific combining ability of the parents should be high in order to develop: a. Hybrids b. Composites c. Varieties d. Synthetics
|
||||
29) Spikelets are characteristic of the family: a. Umbelliferae b. Gramineae c. Malvaceae d. Leguminoceae
|
||||
30) Sporogenesis means: a. Formation of zygote b. Formation of embryo c. Germination of seed d. Development and formation of spores
|
||||
31) Stems often bear: a. Unicellular hairs b. Multicellular hairs c. Both (a) & (b) d. None of above
|
||||
32) Sterility is most pronounced in the F1 generation following: a. Intervarietal hybridization b. Intravarietal hybridization c. Intraspecific hybridization d. Interspecific hybridization
|
||||
33) Sterility incompatibility of distant crosses can e overcome to produce hybrids by: a. Pollen culture b. Anther culture c. Explants culture d. Embryo culture
|
||||
34) Stilt roots are produced from: a. Maint root b. Secondary roots c. Stem and branches d. None of above
|
||||
35) Sudden and sharp change in individual and is directly inherited by the offspring is called: a. Mutation b. Adaptation c. Heredity d. Continuous variation
|
||||
36) Sunflower is: a. Annual herb b. Biennial herb c. Perennial herb d. None of the above
|
||||
37) Superiority of heterozygote leads to: a. Fixation of recessive allele b. Fixation of dominant allele c. Maintenance of both the alleles d. Depression of inbreeding
|
||||
38) System of classification proposed by Hutchinson is: a. Natural b. Artificial c. Phylogenetic d. Numerical
|
||||
39) Tetraploid potato has 48 chromosomes, whereas ordinary piploid species have _______ chromosomes: a. 34 b. 24 c. 14 d. 10
|
||||
40) Which of the following material makes the protein chain? a. Carbohydrates b. Sugars c. Fatty acids d. Aminoacids
|
||||
41) Which of the following leads to the cross-pollination? a. Unisexuality b. Dichogamy c. Heterostyly d. All the above
|
||||
42) The application of principles of genetics for the improvement of mankind is: a. Herdity b. Linkage c. Population genetics d. Eugenics
|
||||
43) The attraction between two dissimilar molecules is: a. Cohesion b. Adhesion c. Surface tension d. None of the above
|
||||
44) Which of the following is sub-aerial modification of stem? a. Corm b. Stolon c. Thorn d. Bulb
|
||||
45) The basis on which evolution works is: a. Simplicity b. Complexity c. Variations d. Adaptation
|
||||
46) The best-known artificial system of classification is that promulgated by: a. Sir Julian Huxley b. Bentham and Hooker c. Linnaeus d. A.P. Candolle
|
||||
47) The best method to break the unfavourable linkage is: a. Single seed descent method b. Diallel selective mating c. Pedigree method d. Bulk method
|
||||
48) The best method to carry forward the maximum number of genotypes/genes to the advanced generations against the force of natural selection is: a. Pedigree method b. Bulk method c. Single seed descent method d. Back cross method
|
||||
49) The botanical name of the onion is: a. Allium sativum b. Allum cepa c. Pisum sativium d. Tagetes erecta
|
||||
50) The branch of genetics concerned with the study of frequencies of mating populations is: a. Quantitative genetics b. Behavioural genetics c. Population genetics d. Eugenetics
|