Phenotype, in short, drags genotypes behind it, like a cart pulling a horse. It is the perennial conundrum of natural selection that it seeks one thing (fitness) and accidentally finds another (genes that produce fitness). Genes that produce fitness become gradually over-represented in populations through the selection phenotypes, thereby allowing organisms to become more and more adapted to their environments. There is no such thing as perfection, only the relentless, thirsty matching of an organism to its environment. That is the engine that drives evolution. Siddharta Mukherjee
About This Quote

Phenotype is another word for physical appearance. The phenotype of a trait is what we see in the world; it’s how we perceive it and no one can deny that we can all agree on. And to be honest, that’s not what evolution is about. Evolution is not about how you look or what you look like, it’s about how your genes work and how they will work in the future.

It’s not just about the phenotype, but also about the genotype. If the genotype is too strong and too successful, then you will get a lot of phenotypes and eventually you will get to a point where there won’t be any evolution anymore because there will be nothing left to evolve from.

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