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Fraternal (Dizygotic) Twins in AP Psychology

Written by the Fiveable Content Team
Verified for the 2027 exam
Verified for the 2027 exam•Written by the Fiveable Content Team

Definition

Fraternal twins are siblings who develop from separate fertilized eggs. They share half their genes just like any other siblings but they share womb environment at the same time.

AP course connection

Topic 2.1: 2.1 Interaction of Heredity and Environment

Unit 2

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