OrthoDB is like a big library of gene information for different species, like animals, insects, and plants. Imagine you're in a big library where all the books are organized by a special way of writing. In OrthoDB, all the genes are arranged in a similar way so we can easily compare them between different species.
Each gene has a special name and function, just like different toys in a toy store. For example, the gene that tells your hair color is called TYR. OrthoDB has lots of these genes collected from different species, and they have been sorted into groups based on their similarities.
The scientists who made OrthoDB used a computer program to compare genes from different species and group the ones that are most alike. This way, they can tell which species are related and how they evolved over time. It's kind of like sorting toys in a toy store based on their color or shape.
People can use OrthoDB to study how genetics work and how different species evolved. It's important because it helps us understand how life on Earth is related and how we might be able to treat diseases or create new organisms.