Advanced Topics
In a nutshell: Genetics is about how traits and characteristics are passed from one generation to the next.
## The Blueprint of Life
Genetics is the study of how traits are passed from parents to offspring. Information is stored in DNA (deoxyribonucleic acid), which acts like a blueprint for building living things.
### How Traits are Inherited
- Genes are segments of DNA that code for specific traits (like eye color).
- Each parent passes on half of their genes to their children.
- Sometimes, traits are dominant (more likely to show up) or recessive (hidden unless both genes match).
### DNA Structure
DNA is shaped like a twisted ladder (a double helix). Its code is made up of four bases: A, T, C, and G.
## Genetics in Action
Genetics explains why you might look like your parents, or why some illnesses run in families.
Examples
- You inherit your hair color from your parents.
- Some plants have purple flowers because of dominant genes.
Key terms
- Gene
- A segment of DNA that codes for a trait.
- DNA
- The molecule that carries genetic information.