Question

Following the 2-nucleate stage, both nuclei divide simultaneously during the second mitotic division. What is the resulting stage called, and how many nuclei are at each pole?

Options

• 4-nucleate stage with two nuclei at each pole

• 2-nucleate stage with four nuclei at each pole

• 4-nucleate stage with four nuclei at each pole

• 8-nucleate stage with two nuclei at each pole

Answer 1

During the second mitotic division (Mitosis II), both nuclei divide simultaneously, creating the 4-nucleate stage with two nuclei positioned at each pole of the embryo sac. This stage is critical as it sets up the distribution pattern necessary for the subsequent third division.