Which of the following describes the way in which monozygotic twins occur?

A) The mother's body releases multiple eggs, two or more of which are fertilized.
B) The mother's body releases one egg, conceives, and then releases another egg in a later ovulation cycle.
C) The egg is fertilized by a single sperm and then splits completely into two separate zygotes.
D) The mother uses fertility drugs.

Monozygotic Twins

Twins that originate from a single zygote splitting and developing into two individuals with nearly identical genetic makeup.

Fertilized

The state of an egg cell after it has been penetrated and combined with a sperm cell, initiating the development of a new organism.

Splits

In psychoanalysis, a defense mechanism where conflicting internal attitudes or perspectives are separated from each other and not integrated.