recessivedescribing an allele whose effect is masked when a contrasting allele is presentCystic fibrosis is caused by inheriting two copies of a recessive allele.NoteCystic fibrosis is caused by inheriting two copies of a recessive allele.Elon.io is an online learning platformWe have an entire course teaching TOEFL Academic Vocabulary grammar and vocabulary.Start learning TOEFL Academic Vocabulary now