Biology Glossary for 16-16 Yr Olds (Chad Evans)

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R

recessive


1) An allele which is only expressed in the abscence of a dominant allele of the gene.
 (Adapted from Edexcel GCSE SCience and Data Resource Book, UG005206) 

2) An allele that produces its characteristic phenotype only when its paired allele is identical (another recessive allele)