There are two primary sources of DNA for cloning.

• Genomic DNA: DNA purified from almost any cell is identical. Can you name an exception?
• cDNA is made from mRNA is not the same from all cells but is reflective of the genes that are actively coding. In addition it lacks introns and can be expressed in prokaryotes.

Text iGenetics by Peter J. Russell

This web site is provided for instruction in Botany and Zoology 342

by Kenneth G. Wilson,
Professor of Botany
Miami University
wilsonkg@muohio.edu