Skip Navigation
The Endowment for Human Development
The Endowment for Human Development
Improving lifelong health one pregnancy at a time.
  • English
Español
Português
Educator Login / Register
Donate Now Get Free Videos

Image Gallery

DNA Structure

DNA Structure [Click for next image]
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
Previous Set Previous Picture
Next Set Next Picture
Buy the Biology of Prenatal Development DVD
Help give babies a healthy start and a healthy future. Donate now.