Skip Navigation
The Endowment for Human Development
The Endowment for Human Development
Improving lifelong health one pregnancy at a time.
Donate Now Get Free Videos

Image Gallery

DNA Structure

From The Biology of Prenatal Development.Buy Now

Note:

Each side of the ladder is made from alternating deoxyribose and phosphate molecules.

Label Key:

1. sides of ladder
2. rungs of ladder
All ages referenced to fertilization, not last menstrual period.
Fertilization Begins
Fertilization Begins
Chromosomes
Chromosomes
DNA Structure
DNA Structure
A Human Cell
A Human Cell
Chromosomes and the Nucleus
Chromosomes and the Nucleus
Sperm
Sperm
When does health begin? Find out now.
Buy the Biology of Prenatal Development DVD


Add a Comment

Your Name: Log In 3rd-party login: Facebook     Google     Yahoo

Comment: