Once a Sperm Enters a Secondary Oocyte

Question

Once a sperm enters a secondary oocyte,
A)meiosis II of the oocyte begins.
B)mitotic division of the oocyte begins.
C)meiosis I of the oocyte begins.
D)other sperm quickly follow into the oocyte.

Accepted Answer

Once a sperm enters a secondary oocyte, the oocyte completes meiosis II, resulting in the formation of a mature ovum and a polar body. This is known as fertilization. The other options are incorrect as mitotic division does not occur in oocyte and meiosis I would have already taken place prior to the ovulation of the oocyte. Multiple sperm cannot enter a single oocyte.