Mating between two individuals related by descent is:
1.Selfing
2.Inbreeding
3.Outbreeding
4.Maintenance of population
Meiosis is essential for the organism for:
1.Inducing polyploidy
2.Growth of the organism
3.Keeping the number of chromosomes constant from one generation to the other
4.Increasing the number of cells
Meiosis occurs in:
1.Generative cells
2.New cells
3.Vegetative cells
4. None of the above
Mendok is a gametocide used for inducing male sterility in:
1.Onion
2.Sunflower
3.Maize
4.Cotton
Monoploid is also a:
1.Haploid
2.Diploid
3.Monosomic
4.None of the above
Nilsson-Ehle of ______ was apparently the first to use the bulk population method to breed superior crop varieties:
1.Sweden
2.Mexico
3.Germany
4.France
Normal female in human being is: .
1.Homogametic sex
2.Heterogametic sex
3.Homizygous for a gene
4.Gynandromorph
Onion and Garlic are example of:
1.Rhizome
2.Tuber
3.Bulb
4.Corn
Pea has stamens:
1.Diadelphous
2.Monoadelphous
3.Polyadelphous
4.Gynandrous
Persons with the following blood group are universal donor:
1. A
2. B
3.AB
4.O
Pigment, which is responsible for skin colour, is:
1.Melanin
2.Glutin
3.Globulin
4.Albumin
Pink (NN) flowered plants crossed with blue (nn) flowered plants gave black (Nn) flowered plants in F1 generation. If F1 plants dre selfed, which of the following will be the phenotype of F2 progeny?
1.All blue
2.1/2 blue and 1/2 pink
3.All pink
4. 1/4 pink, 1/2 black, 1/4 blue
Plants that grow under average condition of temperature and moisture are:
1.Hydrophytes
2.Hygrophytes
3.Mesophytes
4.Xerophytes
Plasmid can:
1.Self replicate
2.Integrate into host genome
3.Express the genes in it
4.Can do all the above
Pototo and Jerusalem artichoke are example of:
1.Rhizome
2.Tuber
3.Bulb
4.Corn
Progeny of a hybrid plant:
1.Breds true
2.Resembles maternal plant
3.Resembles paternal plant
4.Segregation
Prop or still roots are found in:
1.Acacia tree
2.Tomato plant
3.Mango tree
4.Banyan tree
Pureline selection is:
1.A method of accumulating favourable alleles
2.Used to improve cross-pollinated crops
3.Used to improve self-pollinated crops
4.Used in vegetatively propagated crops
Quarantine is:
1.The name of a plant
2.The name of a character
3.The process of observation of alien material
4.None of the above
Restorer gene is needed:
1.To make a plant correct
2.To bring fertility in male sterile plants
3.To make a plant resistant
4.To enhance the yield
Root bear:
1.Unicelluar hairs
2.Multicellular hairs
3.Both (a) & (b)
4.None of the above
Which of the following type(s) of male sterility is/are used in commercial seed production of double cross hybrid maize?
1.Cytoplasm alone
2.Genetic alone
3.Cytoplasm and genetic
4.Cytoplasmic and genetic with restors
Which one of the following categories of seeds is the farmer expected to buy afresh every time?
1.Variety
2.Hybrid
3.Synthetic
4.Composite
Nucleus seed is:
1.100% pure
2. 80% pure
3.50% pure
4.40% pure
Number of chromosome in endosperm is:
1.2n
2.3n
3.n
4.4n
Observation of Hugo de Vries were based on:
1.Pisum stivum
2.Drossophila melangastor
3.Oenothera lamarkiana
4.Solanum tubersoum
Plants, which feed upon insects and small animald absorbing only nitrogenous compounds, are called:
1.Symbionts
2.Epiphytes
3.Carnivorous
4.Nocturnals
Pollination taking place between two flowers (bisexual or unisexual) borne by two separate plants of the same species is called:
1.Self pollination
2.Cross pollination
3.Xenogamy
4.Geitonogamy
Protoplasm is a:
1.True solution
2.Unsaturated solution
3.Suspension
4.Polyphonic colloidal system
Pseudo-fertility may also occur late in the season as in:
1.Tomato
2.Tobacco
3.Tapioca
4.Tea
Pure line is:
1.The progeny of selfed heterozygous plant
2.The progeny of selfed homozygous plant
3.The progeny of vegetatively progagated plant
4.The progeny of a nucleus seed
Rainfall, temperature, light, wind and humidity are:
1.Climatic factors
2.Edaphic factors
3.Biotic factors
4.Topographic factors
Replacement of purine by pyrimidine and vice-versa is known as:
1.Transversion
2.Transduction
3.Translocation
4.All the above
Rice varieties IR 20, IR 26 and IR 36 have shown better resistance to:
1.Tungro
2.Bacterial leaf blight
3.Blast
4.Brown plant hopper
Seeds of monocotyledons are:
1.Albuminous or non-endospermic
2.Ex-albuminous or non-endospermic
3.Both (a) & (b)
4.Neither (a) nor (b)
Seeds of pea, gram and beans are:
1.Albuminous or non-endospermic
2.Ex-albuminous
3.Ex-albuminous
4.None of the above
Mangrove plants show adaptation like:
1.Stilt roots
2.Respiratory roots or pnematophores
3.Vivipary
4.All the above
Megaspore mother cell produces four megaspores out of which usually:
1.Only one megaspore is functional and the remaining three megaspores abort
2.Two megaspores are functional and the remaining two megaspores abort
3.Three megaspores are functional and the fourth megaspore aborts
4.All the four megaspores are functional
Method of breeding can be used for studying the ancestral characteristic:
1.Pure line
2.Pedigree method
3.Mass selection
4.None of these
Microsporogenesis occurs in:
1.Roots
2.Stems
3.Anthers
4.Ovules
Microsporogenesis occurs in:
1.Carpals
2.Gynoecium
3.Stamens
4.Thalamus
Modern population genetics is found on a proposition dedeced independently by Hardy in England in 1908 and _____ in Germany n 1909.
1.Weinberg
2.Pugsley
3.Briggs
4.Weibe
Multiline varieties are mixtures of:
1.Several morphologically different plants having identical disease resistance genes
2.Bulked progenies of different inhred lines
3.Several similar pure lines having different genes for disease resistance
4.Morphologically identical plants with different genetic make-up
Mutation is known to be due to change in genes:
1.Loss
2.Degeneration
3.Addition
4.All the above
Neither beginning nor end to the universe is basis of:
1. Theory of special creation
2.Theory of catastrophism
3.Theory of eternity of present condition
4.None of the above
Nutritional improvement for the tryptophan content has been achieved in a _____ cell-line:
1.Tomato
2.Cucurbits
3.Coffee
4.Tobacco
Operon concept was given by:
1.Watson ana Crick
2.Beedle and Tatum
3.Jacob and Manod
4. Mosselson and Stahi
Orange or lemon fruit is known as:
1.Balusta
2.Pepo
3.Pome
4.Hesperidium
Osmotic pressure of cells sap is high among below given categories in:
1.Mesophytes
2.Halophyte
3.Hygrophytes
4.Hydrophytes
Osra belongs to the family:
1.Solanaceae
2.Malvaceae
3.Cucurbitaceae
4.Liliaceae
Para-mutation in _____ is perhaps the one and only example of blending of alleles:
1.Sorghum
2.Maize
3.Pearl millet
4.Foxtail millet
Phylloclade is:
1.Underground modification of stem
2.Sub-aerial modification of stem
3.Aerial modification of stem
4.None of all
Physical and chemical properties of soil its water and air contents are included in:
1. Climatic factors
2.Edaphic factors
3.Biotic factors
4.Topographic factors
Physiologically dry soil is:
1.Poor in moisture content
2.With adequate water
3.with saline water
4.Normal soils
Plants that attach themselves to any neighbouring object often by means of some special devices and climb it are called:
1.Trailers
2.Creepers
3.Climbers
4.None of these
Plants that grown upon other plants but do not absorb food from them are called:
1.Parasites
2.Epiphytes
3.Saprophytes
4.Symbionts
Pneumatophores or respiratory roots are meant for:
1.Absorption of salts
2.Absorption of water
3.Respiration
4.Photosynthesis
Pneumatophores or respiratory roots are meant for:
1.Absorption of salts
2.Absorption of water
3.Respiration
4.Photosynthesis
Pollination taking place between the flowers borne by the same parent is called:
1.Geitonogamy
2.Alogamy
3.Xenogamy
4.None of the above
Polygenes affecting the same trait, with each enhancing the phenotype are termed as:
1.Amnions
2.Alcaptonuria
3.Allosteric effect
4.Additive factors
Population improvement is used:
1.To accumulate deleterious alleles
2.To maintain homozygosity
3.To accumulate favourable alleles
4.To increase heterozygosity
Probably the most useful measurable property in the soil -plant-air system is:
1.Matric Potential
2.Water Potential
3.Osmotic Potential
4.Redox Potential
Random assortment of genes will occur if the gene are located on:
1.Same chromosome
2.Different chromosomes
3.Sex chromosome
4.Autosome
Recessive lethal genes are carried in the:
1.Heterogenous form
2.Hetrozygous form
3.Homozygous form
4.Homogenous form
Recurrent selection is mostly used in:
1. Cross pollinated crops
2.Self pollinated crops
3.Vegetatively propagated crops
4.Apomictic crop plants
Reduction Division in micro-sporogenesis occurs when:
1.Pollen mother cells are produced from & porocytes
2.Sporocytes are produced
3.Ovules are formed
4. Four pollen grains are formed from a pollen mother cell
Root has:
1.Root cap
2.Region of cell division
3.Give proper anchorage to plant
4.All the above
Secondary nucleus in the embryosac is:
1.Hoplold
2.Diploid
3.Triploid
4.Hexaploid
Selfing of a plant increases:
1.Heterozygosity
2.Homozygosity
3.Homogenecity
4.Heterogenecity
Sex in Drosophila is governed by the following mechanism:
1.XY methods
2.OX method
3.ZZ method
4.X autosomes rati
Single gene affecting more than one character is:
1.Polymorphism
2.Pleiotropy
3.Phenocopy
4.Complete penetrance
Which of the following scientists is called the father of genetics?
1.Charles Darwin
2.Robert Hooke
3.Gregor Mendel
4.Gregor Morgon
Which of the fruit is capsule?
1.Beans
2.Mustard
3.Cotton
4.Wheat