Visit Your Local PBS Station PBS Home PBS Home Programs A-Z TV Schedules Watch Video Donate Shop PBS Search PBS

NOVA Online (see text links below)
Cracking the Code of Life
Understanding heredity
Intro
Pythagoras
Empedocles
Aristotle
Harvey
Leeuwenhoek
de Maupertuis
Darwin
Mendel
Morgan
Crick & Watson
McClintock
Genome Project
Image
An excerpt from Empedocles' ancient text on heredity



c. 490-430 B.C. Empedocles
Pythagoras' theory of heredity could not readily explain the obvious occurrence of shared physical traits between a mother and her child. Empedocles, another Greek thinker, accounted for Pythagoras' oversight by asserting that semen blended with female sexual fluid found inside a woman's body. An embryo, he believed, resulted from the mixing of male and female hereditary material found in these sexual fluids.


Watch the Program Here | Our Genetic Future (A Survey)
Manipulating Genes: How Much is Too Much? | Understanding Heredity
Explore a Stretch of Code | Nature vs Nurture Revisited
Sequence for Yourself | Journey into DNA | Meet the Decoders
Resources | Update to Program | Teacher's Guide | Transcript
Site Map | Cracking the Code of Life Home

Editor's Picks | Previous Sites | Join Us/E-mail | TV/Web Schedule | About NOVA
Watch NOVAs online | Teachers | Site Map | Shop | Search | To Print
PBS Online | NOVA Online | WGBH

© | Updated April 2001

Support provided by

For new content
visit the redesigned
NOVA site

/wgbh/nova/genome/textindex.html /wgbh/nova/genome/