Hello all, 
Genes are DNA (deoxyribonucleic acid) molecule, the fragment has a genetic function, the basic factors of life, human illness and death, health and longevity of the internal factors, determine the survival or decline of all life forms. A person's looks, height, weight, color, nutrition and disease susceptibiity were associated with genes.
Under normal circumstances, gene encoding protein synthesis in the human body through birth, old age, sickness and death, and other physical activities. The body's appearance, personality, disease susceptibility, constitution etc, are closely related genes.
Popular talk: Human genes as parts factory drawings, drawings wrong, the production of defective parts may even be a waste.
Let me say at this point that our genes are sacred as designed by the creator, and this makes each and everyone of us biologically unique.
Thanks for reading