browneyes in the moth Ephestia kuehniella since it can synthesize a precursor pigment molecule, kynurenine. The a mutation interrupts synthesis of kynurenine and yields red eyes.
browneyes if the Aa parent is female. These aa larvae gradually develop red eyes as they grow into adults.
browneyes. As the pigment is diluted among many cells as the larva grows, red eyes emerge.