> For the complete documentation index, see [llms.txt](https://docs.finngen.fi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.finngen.fi/finngen-data-specifics/red-library-data-individual-level-data/genotype-data.md).

# Genotype data

The FinnGen data focuses on ascertaining up to 500,000 samples where along with the available health registry data, the genotype data can further enrich this ascertainment: giving analysts a scientific field that will satiate anyone's scientific curiosities.

![Enriching the samples](/files/XGZCIdn1GDxUxVTI2FsO)

### How genotype data is ascertained and processed

* [**Genotype Arrays Used**](/finngen-data-specifics/red-library-data-individual-level-data/genotype-data/affymetrix-chip-and-its-design.md)
* [**Imputation Panel**](/finngen-data-specifics/red-library-data-individual-level-data/genotype-data/imputation-panel.md)
* [**Genome build used in FinnGen**](/finngen-data-specifics/red-library-data-individual-level-data/genotype-data/human-genome-build-we-use-and-how-do-we-report-genotypes.md)
* [**Genotype Data Processing Flow**](/finngen-data-specifics/red-library-data-individual-level-data/genotype-data/description-of-how-the-data-is-processed-in-refinery.md)
* [**Genotype Files in Sandbox**](/finngen-data-specifics/red-library-data-individual-level-data/genotype-data/types-of-genotype-files-available.md)