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|Common name||Dominant opal|
Dominant opal is an autosomal dominant mutation. This means that only one parent of either sex needs to carry the mutant gene for it to express in the next generation. Unless it is hidden by another modifier, a pigeon not expressing this trait will not pass it onto its children.
Dominant opal is usually lethal when homozygous.
Recessive opal - a visually similar but genetically unrelated trait.