dominant allele

Masking genetic form

A dominant allele is a version of a gene that produces its characteristic effect even when only one copy is present.

If you inherit a dominant allele from one parent and a recessive allele from the other, the dominant trait appears: Brown eyes are dominant over blue.

The term comes from genetics, where alleles are alternative forms of the same gene.

Related

phenotype · genotype · gene expression · Mendel · pea plants · chromosome · DNA · heredity · offspring · hybrid · heterozygous · homozygous · wild type · expression · masking · Punnett square · carrier · mutation

Opposites
genetic expression pattern

dominant allelerecessive gene

Allele expressed only when paired

recessive trait

Family

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