During the pre-embryonic period, a single sperm passes through the zona pellucida. In the vast majority of cases, where does this process occur?
A) in the uterus
B) in the ovary
C) in the oviduct (fallopian tube)
D) in the placenta

Question

Quizplus · Accepted Answer

The pre-embryonic period begins with fertilization, which usually occurs in the oviduct or fallopian tube. The sperm passes through the zona pellucida of the secondary oocyte to fertilize it. Therefore, the correct choice is C, in the oviduct (fallopian tube).

During the Pre-Embryonic Period, a Single Sperm Passes Through the Zona