DNA is the blueprint of life - a double helix structure containing all the genetic information needed to build and maintain every living organism. This remarkable molecule is at the heart of sexual reproduction, ensuring that genetic information is passed from parents to offspring with beautiful variations that drive evolution.
đŦ Key Concepts
Double helix structure with complementary base pairs
Contains genetic instructions for all traits
Undergoes replication before cell division
Mutations create genetic variation
Amazing Fact!
If you unraveled all the DNA in your body and laid it end to end, it would stretch about 10 billion miles - enough to reach from Earth to Pluto!
đ¯ Learning Objectives
Understand how DNA structure enables genetic information storage and transmission, and why genetic variation is crucial for species survival.