Dominant and Recessive Traits
What dominant and recessive traits means
Simple patterns of inheritance.
Before you start
Not confident yet? Work through Genes and Inheritance first.
Worked example
One question from this skill's own question bank, shown with its full working.
A dominant allele is one that
- shows its effect even when only one copy is present
- never shows any effect
- only appears in plants
- changes with the weather
Working: A single dominant allele can mask a recessive one.
Curriculum and exam alignment
Curriculum notes are a general guide to where this work normally sits. Always check the syllabus your school or examination body is currently using.
Related skills
Other Heredity Basics skills in Genetics, at the same point in the course.
Other Genetics topics
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Practise dominant and recessive traits
6 questions with a worked answer after every attempt, and a SmartScore that tracks how close you are to mastery.