Science Olympiad Heredity Practice Test 2025 – Your All-In-One Guide to Mastering Heredity!

Question: 1 / 400

What does a pedigree chart illustrate?

The relationship between different species

The incidence of a genetic trait in a family

A pedigree chart is a visual representation that maps out the inheritance of traits within a family across generations. It typically displays family members' relationships to one another and indicates the presence or absence of specific genetic traits or conditions among those individuals. By using symbols to denote affected and unaffected individuals, a pedigree chart helps trace the lineage of a trait, illustrating how it is passed down from parents to offspring. This makes it a valuable tool in genetics for understanding heredity and predicting the likelihood of traits appearing in future generations. As such, it specifically pertains to the incidence of a genetic trait within a family, which aligns with the selected answer.

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The physical characteristics of an organism

The likelihood of a genetic mutation occurring

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