Question

In the first mitotic division of the functional megaspore, the two daughter nuclei move to opposite poles of the enlarging megaspore. What stage is this called?

Options

• 4-nucleate stage

• 8-nucleate stage

• 2-nucleate stage

• Polar nuclei stage

Answer 1

After the first mitotic division (Mitosis I) of the functional megaspore, two nuclei are produced and they move to opposite poles of the enlarging megaspore, creating the 2-nucleate embryo sac. This is the initial stage of free nuclear division in the development of the female gametophyte.