Some dragons have erect ears others have droeping as these dragons may be fire breathing or not. Erextors and rebrating are due to dominantes c result if two erect eared fire breathing heterryotes were crossed the most common phenotype would be drooping ears and fire breathing all droopy-eared on fire breathing dragons would be pure breeding thomarygous) the least common phenotype would be dreeing ears and fire breathing there would be no phenotypes ox genotypes that resemble the original parents alleret-eared fire-breathing progeny would be heterarygous.