Glossary

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Recessive

Refers to the presence of a genetic disorder when inheriting two changed copies of a gene are needed for a person to show signs of the condition. In recessive inheritance of a gene on the X chromosome (“X-linked recessive inheritance”), males have only one copy of the X chromosome. Therefore, a mutation in a single copy of the gene is enough to cause the disorder. See autosomal recessive and X-linked recessive. Compare this term to dominant.
Reference Genome

A database created by scientists to represent the genetic information in humans. Genetic information is combined from the DNA sequences of 10 to 12 people; the reference genome does not represent any one person’s genetic sequence. It is an example of a human genetic sequence that is useful for genetic analyses.
Replication

Refers to the process of copying all the DNA within the nucleus of a cell when the cell is preparing to divide and make a new cell. Errors in the copying (“replication”) of the DNA are often the source of variations (“mutations”) in DNA.
Report

Result Reports provide information about a genetic testing result, the associated trait, and guidance about what the result means for an individual written using technical terms that make it better suited to share with healthcare providers.
Results Navigator

On the Results Navigator page, you can view the trait profiles, result summaries, and result reports associated with each genetic test result you have selected for return.
Results Preferences

On the Results Preferences page, you can view and set your preferences for which genetic test results you want to receive.