What does the D or I mean in my data?
Here’s an overview of what all the letters in your data mean. Members can take the “Getting Started with Genetics” course for a more in-depth explanation.
| Genotype | Stands for: | Meaning |
| DD | deletion, deletion | There are two copies of the deletion. (Homozygous deletion) |
| II | insertion, insertion | There are two copies of the insertion. |
| DI | deletion, insertion | There is one copy of the deletion and one copy of the insertion variant. (heterozygous deletion/insertion) |
| AA | Adenine, Adenine | There are two copies of the adenine variant. |
| CC | Cytosine, Cytosine | There are two copies of the cytosine variant. |
| GG | Guanine, Guanine | There are two copies of the guanine variant. |
| TT | Thymine, Thymine | There are two copies of the thymine variant. |
| CT or TC | Cytosine, Thymine | There is one copy of the cytosine and one copy of the thymine variant. (heterozygous) |
| AG or GA | Adenine, Guanine | There is one copy of the adenine and one copy of the guanine variant. T |
| — | either not genotyped or no call | The result isn’t available in your data. It may be that the company you used for sequencing didn’t include that rs id, or it could be that they couldn’t get a clear read on it. |