Skip to content

Subjects

History
Geography
Biology
Chemistry
Physics
Mathematics
English Literature

Resources

Browse Courses
Past Papers
Key Terms & Definitions

About

Sign Up
Log In
Privacy Policy
Terms of Service

© 2026 GradeGen.AI

Not affiliated with any exam board.

Home
Subjects
Past Papers
Key Terms
Settings

My Courses

Select your courses

Courses
Biology
Key Terms
Recessive allele

Recessive allele

Biology

An allele that is only expressed in the phenotype if two copies are present.

Found in Revision Notes

Understanding Genetics

Understanding Genetics

Inherited Disorders

Inherited Disorders

Analysing Inheritance using Family Trees

Genetic Inheritance

Predicting Inheritance: Punnett Squares and Probability

Genetic Inheritance

Key Vocabulary and Principles of Genetic Inheritance

Genetic Inheritance

Related Key Terms

Allele Amniocentesis Carrier Chorionic villus sampling (CVS)Chromosome Chromosomes Cystic fibrosis Dominant allele

Revise This Topic

Sign up to access full revision notes, track your progress, and master every key term.

Sign Up to Start Revising Log In