Tobacco leaf discs are transferred with Agrobacterium tumefaciens strain containing binary vector (GUS as reporter gene) with selectable marker neo (kanamycin resistance gene) and then regenerated to plants. The plants are kanamycin resistant, but leaf tissues are negative to GUS assay. The explanation is
A. The plants are transformed for both genes but GUS gene is turned
B. The plants are transformed for only neo gene not the GUS gene
C. The plants are not transformed at all, but the development of kanamycin resistance is due to somaclonal variation
D. All the above
Answer: Option D
This Question Belongs to Biotechnology Engineering >> Plant Biotechnology
Gynogenesis is a process of development of haploid plants
A. From a fertilized cell of female gametophyte
B. From an unfertilized cell of female gametophyte
C. From isolated pollen grains
D. By selective elimination of chromosomes following distant hybridization
Parthenogenetic embryos in plants are those which are formed by
A. Unfertilized eggs
B. Fertilized eggs
C. Sporophytic cells
D. Male gametophyte
Large scale clonal propagation practically means raising a population of plantlets from
A. A single cell
B. A single explant
C. Many explants from a single plant
D. Many explants from a group of plants
A. Both (A) and (R) are true but (R) is not the correct reason for (A)
B. (A) is false but (R) is true
C. (A) is true but (R) is false
D. Both (A) and (R) are true and (R) is the correct reason for (A)
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