Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Heritable genetic variation refers to differences in genes that are passed down from parents to offspring. These variations can lead to differences in appearance, behavior, and ability to survive and reproduce.
A mutation is a change in DNA sequence within a gene. It's like if one of your playing cards got damaged or altered - it could change how you play the game.
The phenotype is an individual’s observable traits or characteristics. It's how you play your hand in our card game - it depends on both what cards you have and how you choose to use them.