What are the plants developed through plant tissue culture called?

After how many weeks is the callus obtained?

Which of the following is a somatic hybrid?

In vitro clonal propagation in plants is characterized by

Discuss how the property of plant cell totipotency has been utilised for plant propagation and improvement.

In tissue culture experiments using tobacco callus,it was observed that when the culture medium contains $2 \ ppm$ of $IAA$ and $2 \ ppm$ of kinetin,an undifferentiated mass of callus is produced. If the ratio of kinetin to $IAA$ is increased,what will happen?