Section A
Q1. Answer the following questions in about 150 words each:
(a) Define cell cycle. Describe different types and phases of cell cycle.
(b) Briefly discuss significant features of heterosis and explain the dominance and overdominance hypotheses of heterosis, giving their main features.
(c) Define Marker-Assisted Selection and give suitable examples. Discuss the applications of marker-assisted selection in recurrent selection, gene pyramiding and QTL introgression.
(d) Define 'Grow-out test'. Explain briefly the methods of roguing in seed fields.
(e) Classify plant mineral nutrients based on biochemical functions. How do excess minerals in the soil limit the plant growth?