by Miller & Levine
[complete Table of Contents]
the pull-down menu to jump to any of the Book's 40 Chapters:
sure to visit our cloning web page,
with news on clones and cloning research.
do you feel about genetically-modified food? Page
330 discusses this important issue.
chapter, students will read about techniques for manipulating DNA, including
the production of recombinant organisms. Students will also be introduced
to some of the practical applications of recombinant DNA technology. The
links below lead to additional resources to help you with this chapter.
13-1: Changing the Living World
Humans use selective
breeding to pass desired traits on to the next generation of organisms.
Breeders can increase the genetic variation
in a population by inducing mutations, which are the ultimate source of
13-2: Manipulating DNA
Scientists use their knowledge of the
structure of DNA and its chemical properties to study and change DNA molecules.
Different techniques are used to extract DNA from cells, to cut DNA into
smaller pieces, to identify the sequence of bases in a DNA molecule, and
to make unlimited copies of DNA.
Knowing the sequence of an organism's
DNA allows researchers to study specific genes, to compare them with the
genes of other organisms, and to try to discover the functions of different
genes and gene combinations.
Early (©2002) printings of the Dragonfly Book contain
a minor error in Figure 13-7. Click
Here for the proper figure.
13-3: Cell Transformation
During transformation, a cell takes in
DNA from outside the cell. This external DNA becomes a part of the cell's
If transformation is successful, the
recombinant DNA is integrated into one of the chromosomes of the cell.
13-4: Applications of Genetic Engineering
Using the basic techniques of genetic
engineering, a gene from one organism can be inserted into cells from
another organism. These transformed cells can then be used to grow new