What is a piece of DNA that codes for a characteristic?

How does sweat form in your body? How are organ systems are organized? What does a girl really want from life? What makes two people attracted to each other? Do prokaryotic cells exchange gases? Do balsam has tap root system? What is Ares' symbol of Authority? What information is included in each square of the periodic table of elements? What organ stores fat? What are some advantages and disadvantages of natural environment? What are organic paperplates made out of? Do octopuses have big eyes? For nonmetallic-sheathed cable may the uninsulated conductor be used for purposes other than grounding? Why do the leaves appear green to human eye and red in color composite? Does Mount st Helens have a Hawaiian eruption? What order is the information in DNA coded in? Vivitar binocular 10x25 digital camera drivers download? Of the four classes of biologically significant macromolecules the one that provide the main source of energy for most organisms are? How can there be so much fish in the sea if there is pollution and global warming and they are dying? What factors are important in determining whether a company is under or over organized?

What is a piece of DNA that codes for a characteristic?