the allele for black noses in wolves
A:
Concept:
Black noses are a melanin-based trait; there isn’t a single universal allele.
Nose color is influenced by multiple pigmentation genes (e.g., MC1R, ASIP) that regulate eumelanin production in nasal tissue.
Example:
Some wild gray wolves (Canis lupus) exhibit a fully black nose, a phenotype linked to higher eumelanin in the nasal tissue rather than a single “black-nose” allele.