Dominant Genetic Disorder
In dominant genetic disorders, if one affected parent has a disease-causing gene that dominates its normal counterpart, each child in the family has a 50% chance of inheriting the disease-causing gene and the disorder.
Dominant gene. A gene whose phenotype is when it is present in a single copy.
Dominant(-acting) oncogene. A gene that stimulates cell proliferation and contributes to oncogenesis when present in a single copy. (See Oncogene.) ...
Dominant gene
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.
All dominant genes are marked in red, and all recessive genes are marked in green. Whenever the dominant gene is present in an organism this will be expressed. We can summarise the above diagram in the following statements ...
An autosomal dominant gene is one on an autosome and is always expressed, even if a single copy exists. The chance is 1:2 for passing this gene to offspring.
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See more about: Autosome ...
Oncogene A dominant gene whose expression leads to uncontrolled cellular proliferation.
Open reading frame see reading frame ...
Porphyria a dominant genetic inability to make porphyrin
(porphyr = purple; -ia = state of‚ condition of‚ disease) ...
A dominant gene, or a dominant version of a gene, is a particular variant of a gene, which for a variety of reasons, expresses itself more strongly all by itself than any other version of the gene which the person is carrying, and, in this case, ...
Main article: Autosomal dominant#Autosomal dominant gene
Only one mutated copy of the gene will be necessary for a person to be affected by an autosomal dominant disorder. Each affected person usually has one affected parent.
A dominant phenotype results from either one or two dominant genes. In the cross above, YY or Yy are yellow; yy is green. The phenotype ratio in the F2 is 3 yellow:1 green. The genotype ratio is 1YY:2Yy:1yy.
The recessive gene - today called le - turns out to encode an enzyme that is defective in enabling the plant to synthesize GA. The dominant gene, Le, encodes a functioning enzyme permitting normal GA synthesis and making the "tall" phenotype.
 See also: Dominant, Gene, Chromosome, Chromosomes, Genetics
  
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