The biggest challenge a person who wants to be a professional model faces is his or her own DNA. You may be thinking, “What?” You know, deoxyribonucleic acid – chromosomes and genetics. Especially in the fashion modeling industry, strict height and weight guidelines can crush the dreams of a beautiful person whose DNA keeps him or her from reaching those standards. When it comes to fashion modeling, either you were born to be a fashion model or you were not.