dominance of traits

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Related to dominant inheritance: codominant inheritance

dom·i·nance of traits

an expression of the apparent physiologic relationship existing between two or more genes that may occupy the same chromosomal locus (alleles). At a specific locus there are three possible combinations of two allelic genes, A and a: two homozygous (AA and aa) and one heterozygous (Aa). If a heterozygous individual presents only the hereditary characteristic determined by gene A, but not a, A is said to be dominant and a recessive; in this case, AA and Aa, although genotypically distinct, should be phenotypically indistinguishable. If AA, Aa, and aa are distinguishable, each from the others, A and a are codominant.

dom·i·nance of traits

(dom'i-năns trāts)
An expression of the apparent physiologic relationship existing between two or more genes that may occupy the same chromosomal locus (alleles). At a specific locus there are three possible combinations of two allelic genes, A and a: two homozygous (AA and aa) and one heterozygous (Aa). If a heterozygous individual presents only the hereditary characteristic determined by gene A, but not a, A is said to be dominant and a recessive; in this case, AA and Aa, although genotypically distinct, should be phenotypically indistinguishable. If AA, Aa, and aa are distinguishable, each from the others, A and a are codominant.
References in periodicals archive ?
Hereditary retinoblastoma shows autosomal dominant inheritance with 90% clinical penetrance.
Johnson et al supported the dominant inheritance theory of both TP and TM.
In familial cases, autosomal dominant inheritance is more common than X-linked inheritance.
Also, Native Americans have a hereditary form of PMLE with autosomal dominant inheritance that can involve the face and is most common in patients with Fitzpatrick skin types
There is usually a VHL tumor suppressor gene germline mutation with an autosomal dominant inheritance pattern.
Marfan syndrome is a connective tissue disorder of autosomal dominant inheritance, with an incidence of 1:5000.
A new case of Klippel-Trenaunay-Weber (KTW) syndrome: evidence of autosomal dominant inheritance.
Cleidocranial dysplasia (CCD) is a rare disorder with autosomal dominant inheritance, though 40% cases occur spontaneously with no apparent genetic cause.
In addition, hereditary methemoglobinemias due to NADH dependent cytochrome reductase (NADH dependent methemoglobine reductase = NADH dependent diaphorase) deficiency, which was assayed only by us so far in Turkey with probable dominant inheritance and Hemoglobin M cases were reported on several journals (5-11).
Autosomal recessive inheritance of asthma was more common than dominant inheritance in our study population.
Early-onset type 2 diabetes is characterized by insulin resistance, obesity, the onset of diabetes before age 40 years, and the occasional presence of autosomal dominant inheritance (1, 2).