Question

Meiotic division of the secondary oocyte completed ______.

Options

• at the time of copulation

• after zygote formation

• at the time of fusion of a sperm with an ovum

• prior to ovulation

Answer 1

Meiotic division of the secondary oocyte completed at the time of fusion of a sperm with an ovum.

Explanation:

The secondary oocyte's meiotic division is halted during the Metaphase II phase of meiosis II. The division is completed once the sperm fertilises the ovum. So the correct answer is 'at the time of sperm-ovum fusion.'