Last chapter, we learned the basics of genetics. We have learned how a dominant gene will hide a recessive one and the difference between being homozygous and heterozygous. We also learned how to describe an organism phenotypically and genotypically. But, how does all this work? Well, that is what this chapter is all about! How is a strand of DNA built, how does it hold genetic information and what is RNA anyway are all questions that will be answered in this chapter. So come along, and enjoy the ride!