Question

Male nucleus of flowering plant fuses with the egg nucleus in

• A. Promitotic phase
• B. Mitotic phase
• C. Intermediate state
• D. All the above

Answer 1

The correct option is A Promitotic phase

Most commonly the male nucleus of the flowering plant fuses immediately with the egg nucleus in premitotic phase. This process of fusion is called as premitotic karyogamy. After a short hiatus, the zygote nucleus passes through S phase, G${}_2$ phase and mitotic phase to complete the first zygotic division.

Thus, the correct answer is option A.