🧬ap biology review

Crossing Over

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

Crossing over is a process that occurs during meiosis where two chromosomes pair up and exchange segments of their genetic material. This leads to a mix of parental traits in offspring, contributing to genetic diversity.

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