| Glossary Term | Semidominant |
| Definition |
One of a series of terms applied to the phenotypic effect of a particular allele in reference to another allele (usually the standard wild-type allele) with respect to a given trait. An allele "A" is said to be semidominant with respect to the allele "a" if the A/A homozygote has a mutant phenotype, the A/a heterozygote has a less severe phenotype, while the a/a homozygote is wild-type. An example is Pmp22(Tr-J) in mouse. Pmp22(Tr-J)/Pmp22(Tr-J) animals display a myelination defect associated with a "trembler" phenotype, while Pmp22(Tr-J)/Pmp22(+) animals are less severely affected, and Pmp22(+)/Pmp22(+) animals are wild-type. See also: |
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Tumor Biology (MTB), Gene Ontology (GO), MouseCyc |
||
|
Citing These Resources Funding Information Warranty Disclaimer & Copyright Notice Send questions and comments to User Support. |
last database update 07/15/2014 MGI 5.18 |
|
|
|
||
Analysis Tools