Overview and Objectives - DNA and DNA Extraction

This lesson discusses what DNA is and how it relates to genes and chromosomes. How and why DNA is extracted in the genetic engineering process is also covered. At the completion of this lesson, you should be able to:

  • Visualize the relationship between DNA, genes, and chromosomes.
  • Compare the roles that DNA and proteins play in a cell.
  • Explain how proteins are made from DNA (the processes of transcription and translation).
  • Contrast DNA and proteins in their chemical make up.
  • Explain why DNA extraction is important in genetic engineering and how it is done.
  • Understand why genes can be transferred between organisms and still work.
Peer Reviewed Web Lesson JNRLSE Approved 2003

Development of this lesson was supported in part by Cooperative State Research, Education, & Extension Service, U.S. Dept of Agriculture under Agreement Number 98-EATP-1-0403 administered by Cornell University and the American Distance Education Consortium (ADEC). Any opinions, findings, conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.