Explain how genes control our traits with a specific example

Explain how genes control our traits with a specific example. Your explanation should contain the following words: transcription, translation, gene, mRNA, and protein. You should include the name of a specific gene and a specific protein, and try explain how the role of that particular protein relates to the trait.
Example: The MC1R gene codes for the pigment protein melanin, which is responsible for the traits of brown eyes, skin and hair. The MC1R gene is first transcribed into mRNA, then translated into the melanin protein. If a mutation occurs in the MC1R gene, the result may be no melanin proteins produced, and a condition called albinism. Please find another example of a specific gene and corresponding protein (not melanin). I encourage you to briefly look through previous posts and try to find a new gene/protein not yet described. If you choose a previously described gene/protein, make sure your post contribute new information.