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 ?
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 dominant inheritance has rarely been reported with familial DCM.
Autosomal recessive inheritance of asthma was more common than dominant inheritance in our study population.