defined: |
![](https://webarchive.library.unt.edu/eot2008/20080916013851im_/http://genome.gov/Images/spacer2.gif) |
A gene that almost always results in a specific physical characteristic, for example, a disease, even though the patient's genome possesses only one copy. With a dominant gene, the chance of passing on the gene (and therefore the disease) to children is 50-50 in each pregnancy.
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