Advanced Topics
In a nutshell: Molecular genetics explains how genetic information is copied and used within cells.
## Inside the Cell
Molecular genetics studies how genes are copied, read, and used in living cells.
- **Replication**: DNA makes a copy of itself before a cell divides.
- **Transcription**: DNA is used to make messenger RNA (mRNA).
- **Translation**: mRNA is used to build proteins.
## The Central Dogma
The flow of genetic information is often summarized as:
\[
\text{DNA} \rightarrow \text{RNA} \rightarrow \text{Protein}
\]
## Why Does This Matter?
Knowing how genes work at a molecular level helps us understand diseases, develop new medicines, and engineer better crops.
## Genetic Engineering
Scientists can now edit genes using tools like CRISPR, opening up amazing possibilities—and important ethical questions!
\text{DNA} \rightarrow \text{RNA} \rightarrow \text{Protein}
Examples
- Using CRISPR to correct a genetic mutation in lab mice.
- Sickle-cell anemia is caused by a tiny change in the DNA code for hemoglobin.
Key terms
- Transcription
- The process of copying DNA into RNA.
- Translation
- The process by which cells make proteins from RNA.
- CRISPR
- A powerful tool for editing genes.