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A gene form (allele) coding for a specific trait that is expressed only when an identical allele is present; produces its given phenotype only when the genotype is homozygous recessive.

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1. A gene form (allele) coding for a specific trait that is expressed only when an identical allele is present; produces its given phenotype only when the genotype is homozygous recessive.
Image: Recessive





 
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