What combination of alleles results in the Freeway morph?

Asphalt Yellowbelly

The Yellow Belly gene is highly valued in the captive breeding world primarily because of its powerful utility as an enhancer, meaning it brightens and cleans up the appearance of other genes with which it is combined. When combined with certain other alleles from its own series, specific, recognized morphs are produced. The Freeway morph is an example of this interaction within the series, resulting from the pairing of the *Asphalt* allele with the foundational *Yellowbelly* allele. Similarly, the *Gravel* allele combined with *Yellowbelly* results in the Highway morph, showcasing how different alleles at the same locus create distinct outcomes when paired with the YB gene.