Pollen grains of a plant, whose $2 n=28$, are cultured to get callus by tissue culture method. What would be the number of chromosomes in the cells of the callus?
$28$
$21$
$14$
$56$
To obtain virus free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken?
Somatic hybrids are produced by
Pomato is
Which of the following shows correct chronological order of the events occurring during callus culture?