🧬ap biology review

Fertilization

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

Fertilization is the process in which two gametes, one from a male parent and another from a female parent, combine to form a zygote. The zygote is the first cell of a new individual with a complete set of chromosomes.

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