GE In-Depth GE In-Depth
     

GE Basics
Locating Genetic Information

Timeline of GE

Processes
Recombinant DNA:
How Genes Are Transferred

   

Recombinant DNA: Example Using Insulin

Cloning:
How To Make Identical Genomes

 

 

 Locating Genetic Information
 

DNA (deoxyribonucleic acid )

Genes are composed of deoxyribonucleic acid, also known as DNA. The DNA molecule is made up of two chains of nucleotides. A nucleotide is made up of a one "base" chemical (adenine, thymine, guanine, and cytosine), a molecule of sugar and a molecule of phosphoric acid. (More on base pairs later.)

DNA looks like a twisted ladder. This structure is called a double helix. The arrangement of the nucleotide molecules gives DNA its helical shape. The sugar and phosphate molecules form the sides of the ladder. The base pairs are the ladder rungs (the part you step on).

Next, learn what base pairs are and how they work.

 

<< Previous     Locating Genetic Information      Next >>


Explore More: Genetic Engineering
Copyright 2004, Iowa Public Television
The Explore More project is supported by funds from the
Roy J. Carver Charitable Trust
and the USDE Star Schools Program.