Germplasm means:
1.A breeding method
2.A collection of genetic material
3.A new disease
4.None of the above
Heritability may be defined as the:
1.Interaction product of genotype with environment
2.Sum total of hereditary material present in a species
3.Degree of resemblance between the original and the selected plants
4.Proportion of phenotypic variability which is due to heredity
Heterosis over the better parent is called as:
1.Relative heteroisi
2.Standard heterosis
3.Pseudoheterosis
4.Heterbeltiosis
Hugo de Vries who defined the mutation was:
1.Dutch Botanist
2.French Bacteriologist
3.English Botanist
4.Russian Biologist
Hybrid seeds can be produced through open pollination with the use of:
1.Inbreds
2.Clones
3.Pure lines
4.Male sterile lines
If a character is cytoplasmically controlled then:
1.The progeny resembles female parent
2.The progeny resembles male parent
3.Its segregation of 3:1 is observed in F1
4.15:1 segregation in F1
If a dihybrid is test crossed the phenotypic ratio of progeny will be:A. B. C. D.
1.9:3:3:1
2.9;3;4
3.1:1:1:1
4.15;1
If more solute is added to a saturated solution it settles down but if heated the excess amount also gets dissolved. Such a solution said to be:
1.Unsaturated
2.Saturated
3.Super saturated
4.Crystalloid
If parents differ in ten gene pairs no selection is done; six back crosses will produce a population having ______ per cent homozygous and identical individuals to recurrent parent at all ten loci:
1.65
2.75
3.85
4.95
If the cells of a plant root tip contain chromosomes will be found in its pollen grains?
1.4
2.8
3.16
4.32
In asparagus one or more short green cylindrical or sometimes flattened branches of limited growth develop from node of stem such a branch is known as:
1.Cladode
2.Phylloclade
3.Stem tendril
4.Thorn
In Primula sp:
1.Sporophytic incompatibility found
2.Gametophytic incompatibility found
3.Heteromorphic incompatibility found
4.Homomorphic incompatibility found
In RNA nitrogen bases are same as in DNA except:
1.Uracil instead of Thymlnine
2.Cytosin instead of Thymine
3.Adenine instead of Guanine
4.Thymine instead of Adenine
In self-incompatibility system:
1.Pollen not produced
2.Self pollination takes place
3.Pollen does not germinate on self-pollination
4.All are correct
In solanaceae the flowers are:
1.Actionomorphic bisexual and epigynous
2.Zygomorphic unisexual and perigynous
3.Actinomorphic bisexual and hypogynous
4.Actinomorphic bisexual and perigynous
In sweet pea gene C or P alone produces white flower where as both C and P are needed to produce purple coloured flower. In a particular cross between two white flowered plants the offsprings were one half purple and one-half white. The possible genotypes of the parents is:
1.Cc Pp x ccPp
2.CCpp x ccPP
3.ccPp x CCpp
4.Ccpp x ccPp
In the ovary of marigold the placentation is:
1.Superficial
2.Basal
3.Marginal
4.Axile
In which one of the following crops maximum exploitation of hybrid vigour during the last three decades has been done?
1.Wheat
2.Rice
3.Maize
4.Cotton
Inflorescence of wheat ear is:
1.Catkin
2.Spike
3.Corymbs
4.Raceme
It has been estimated that a miize tassel produces at least _____ pollen grains for each kernel.
1.5,000
2.15,000
3.25,000
4.35,000
It is an established fact that higher and more complex forms of plants and animals have evolved from:
1.Recent and simpler forms
2.Earlier and simple forms
3.Recent and complex forms
4.Xerophytic forms
Krebs cycle begins with:
1.Glycogen
2.Lysine
3.Succinic acid
4.Acetyl COA
Later formed rocks show fossils of:
1.Less complex and less advance types
2.More complex and more advance types
3.Simpler types
4.Simpler and more recent types
Maize is:
1.Maonecious plant
2.Dioecious plant
3.Polygamous
4.None of the above
Mango fruit is a:
1.Pepo
2.Pome
3.Berry
4.Drupe
Which one of the following is the site of protein synthesis?
1.Ribosomes
2.t-RNA
3.m-RNA
4.r-RNA
If the particles of dispersed phase have an affinity towards the particles of the dispersion medium the colloidal system is known as:
1.Lyophobic
2.Hydrophobic
3.Lyophilic
4.None of the above
In compositeae the gynoecium is syncarpous bicarpellary with:
1.Marginal placentation
2.Axile placentation
3.Free central placentation
4.Basal placentation
In cruciferae the stamens are said to be:
1. Decadynamous
2.Tridynamous
3.Tetradidynamous
4.None of the above
In Ficus (banyan pepal fig) the inflorescence is:
1.Cyathuim
2.Verticillaster
3.Hypanthodium
4.Spadix
In pedigree breeding single plants are selected in which one of the following generation:
1.F5
2.F3
3.F2
4.F
In the flowering plants the process of fertilization is first discovered by:
1.Robert Brown
2.Strasburger
3.Virchov
4.Nawaschin
In ______ pollen dispersal is poor and seed set is likely to be low on male sterile plants:
1.Tomato
2.Cauliflower
3.Broccoli
4.Carrot
Johansen proposed:
1.Theory of heterosis
2.Pure line theory
3.Male sterility
4.Hybridization
Most of the mutation have effect:
1.Deleterious
2.Good
3.Bad
4.Both (b) & (c)
Which one of the following chemicals is used to induce polyploidy?
1.Ethyl methane sulphonate
2.Methyl methane sulphonate
3.Colchicines
4.Nitrous acid
152. Heterosis is commercially exploited in:
1.Cross pollinated species
2.Often cross-pollinated species
3.Self-pollinated species
4.Vegetatively propagated species
Genotype x Environment interaction would take place when there is/are:
1.One genotype and two environments
2.Two genotypes and one environment
3.Three genotypes and one environment
4.Two or more genotypes and two or more environments
Gibberellins are now commercially used into increase sugarcane growth and sugar yields :
1.China
2.Hawaii
3.Japan
4.Korea
Ginger and Turmeric are example of modified stem:
1.Rhizome
2.Tuber
3.Bulb
4.Corm
Given that the somatic cromosome number of Triticum aestivum is 2n = 6x = 42 which one of the following pairs is correctly matched?
1.Monosome
2.Monosome
3.Tetrasome
4.Nullisome
Group of plants with similar characteristics of any rank is termed:
1.Taxon
2.Species
3.Genus
4.Order
Gynoecium or pistil in the female whorl differentiated into:
1.Filament
2.Style
3.Stigma
4.All of the above
Holophytes growing on muddy swarmps form special vegetation known as:
1.Hangrove forests
2.Coniferous forests
3.Evergreen forests
4.Riparian forests
How many cells will be produced from a cell if the cell divides meiotically?
1.1
2.2
3.3
4.4
Hydrilla is a:
1.Hydrophyte
2.Mesophyte
3.Hygrophyte
4.Xerophyte
ICRISAT deals with:
1.Cotton
2.Maize
3.Millets
4.Wheat
If a membrane allows the passage of both solvent and solute molecules it is said to be:
1.Non-permeable
2.Impermeable
3.Semi-Permeable
4.Permeable
If dissolved sugar in pure water the resulting solution will have osmotic potential than that of pure water:
1.Equal
2.More positive
3.More negative
4.Difficult to measure
In Angiosperms:
1.Sporophyte is complex and gametophyte incospicuous
2.Sporophyte simple and gametophyte complex
3.Sporophyte and gemetophyte complex
4.Sporophyte and gametophyte incospicuous
In bajra:
1.Cytoplasmic male sterility is found
2.Genetic male sterility is found
3.Cytoplasmic genetic male sterility is found
4.Self-incompatibility is found
In C4 pathway CO2 combines with:
1.Ribulose monophosphate
2.Phosphoglyceric acid
3.Ribulose diphosphate
4.Phosphenol pyruvate
In China rose flower is:
1.Hypogynous
2.Perigynous
3.Epigynous
4.None of the above
In cotton the popularly grown commercial hybrid varalaxmis is the product of:
1.Intraspecific hybridization in Gossypium hirsutum
2.Interspecific hybridization between Gossypium hirsutum and Gossypium barbadense
3.Intraspecific hybridization in Gossypium barbadense
4.Interspecific hybridizaton between Gossypium arboreum and Gossypium herbaceum
In famtly malvaceae the stamens are:
1.Diadelphous
2.Gynandrous
3.Syngenesious
4.Monoadelphous
In mass selection plants are selected on the basis of:
1.Phenotypes
2.Genotypes
3.Homozygosity
4.None of the above
In potato the inflorescence is:
1.Helicoid
2.Scropioid cyme
3.Umbel
4.Raceme
In the cymose inflorescence the flowers develop in:
1.Basipetal succession
2.Acropetal succession
3.Centripetal succession
4.None of the above
In the pitcher plant the pitcher is modification of:
1.Stem
2.Root
3.Leaf
4.Stem-branch
In wheat and oat there are _____ genes for red versus white kernels:
1.Two
2.Three
3.Four
4.Five
In wheat cross-pollination is:
1.Less than 5%
2.More than 5%
3.15%
4.50%
In which part of the cell does protein synthesis take place?
1.Mitochondria
2.Nucleolus
3.Nucleus
4.Ribosomes
In ______ the first studies on artificial hybridization for which yields were reported were those of Beal during the period between 1877 and 1882:
1.Sorghum
2.Pearlmillet
3.Maize
4.Carrot
International Rice Research Institute (IRRI) is situated in:
1.Philippines
2.Japan
3.China
4.Burma
Leaf of the Mimosa is:
1.Unipinnate
2.Bipinnate
3.Tripinnate
4.Decompound
Magnification of an object by electron microscope is:
1.1000 X
2.100000 X
3.100000 X
4.More than 200000 X
Male gamete carries ______ chromosome numbers:
1.Non-permeable
2.2n
3.3n
4.n - 1
Mendel is famous for:
1.Propounding the laws of inheritance
2.Laws of limiting factors
3.The theory of mutation
4.The discovery of penicillin
Which one f the following is not dioecious plant?
1.Datepalm
2.Vallisnaria
3.Maize
4.Papaya
Which sterility is exploited in hybrid seed production?
1.Male genetic sterility
2.Cytoplasmic sterility
3.Cytoplasmic genetic male sterility is found
4.Genetic