So there's genes for the short tail in the band-tailed pigeon, genes for the long tail in the passenger pigeon, and so on with the red eye, peach-colored breast, flocking, and so on.
像是带尾鸽拥有短尾的基因 而旅鸽则是表现长尾的基因 还有红颜、桃红色的胸部和群集行为等基因