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nounan allele that produces its characteristic phenotype only when its paired allele is identical
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adjectiveof or pertaining to a recession
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adjective(of genes) producing its characteristic phenotype only when its allele is identicalOpposite:
Definition that contains recessive
- carrier (genetics) an organism that possesses a recessive gene whose effect is masked by a dominant allele; the associated trait is not apparent but can be passed on to offspring
- werdnig-hoffman disease autosomal recessive disease in which the degeneration of spinal nerve cells and brain nerve cells leads to atrophy of skeletal muscles and flaccid paralysis; death usually occurs in early childhood
- pseudohypertrophic dystrophy the most common form of muscular dystrophy; inheritance is X-linked recessive (carried by females but affecting only males)
- charcot-marie-tooth disease a form of neuropathy that can begin between childhood and young adulthood; characterized by weakness and atrophy of the muscles of the hands and lower legs; progression is slow and individuals affected can have a normal life span; inheritance is X-linked recessive or X-linked dominant
- alkaptonuria a rare recessive metabolic anomaly marked by ochronosis and the presence of alkapton in the urine
- tyrosinemia autosomal recessive defect in tyrosine metabolism resulting in liver and kidney disturbances and mental retardation
- hereditary motor and sensory neuropathy a form of neuropathy that can begin between childhood and young adulthood; characterized by weakness and atrophy of the muscles of the hands and lower legs; progression is slow and individuals affected can have a normal life span; inheritance is X-linked recessive or X-linked dominant
- limb-girdle muscular dystrophy an autosomal recessive form of muscular dystrophy that appears anywhere from late childhood to middle age; characterized by progressive muscular weakness beginning either in the shoulder or pelvic girdle; usually progresses slowly with cardiopulmonary complications in the later stages
- autosomal recessive defect a disease caused by the presence of two recessive mutant genes on an autosome
- test-cross a cross between an organism whose genotype for a certain trait is unknown and an organism that is homozygous recessive for that trait so the unknown genotype can be determined from that of the offspring