Recessive trait

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.

recessive trait

an inherited characteristic that is determined by a recessive allele.

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.

Recessive trait

An inherited trait that is outwardly obvious only when two copies of the gene for that trait are present—as opposed to a dominant trait where one copy of the gene for the dominant trait is sufficient to display the trait. The recessive condition is said to be masked by the presence of the dominant gene when both are present; i.e., the recessive condition is seen only in the absence of the dominant gene.
References in periodicals archive ?
The rarest combination is a person with red hair and blue eyes, which also are a recessive trait.
This limited panel would suffice to classify the SCID into T-, B+, NK+/-, or T- B- NK+/- types, [gamma] chain deficiency is the only T- B+ NK- SCID type [Figure 1] that is inherited in an X-linked manner, while others such as JAK3, IL7R[alpha], CD45, and Coronin-1 A follow the autosomal recessive trait.
Of course, both alleles at a given locus must be recessive in order for the recessive trait to be manifested.
Idiopathic infantile hypercalcemia appears to be inherited as an autosomal recessive trait.
While many traits are governed by multiple genes, tiger breeding practices have established that the white coat trait is a single recessive trait, according to Shu-Jin Luo, a researcher at the Peking-Tsinghua Center for Life Sciences.
On the other hand, HSAN type2-5 have autosomal recessive trait and the neurologic findings are congenital (5).
Papillon-Lefvre syndrome is a rare genetic condition which is inherited as an autosomal recessive trait.
DRD can be inherited as either an autosomal dominant or a recessive trait and is most often caused by autosomal dominant point mutations or, more rarely, deletions in the GCH1 (GTP cyclohydrolase 1) gene, which encodes the GCH1 enzyme.
Gilbert's Syndrome is a major cause of neonatal jaundice and is present at conception, inherited by the fetus as a recessive trait from both parents.
It is an X-linked recessive trait, which explains why only males are usually affected.
She discovered that the lizards use the gene in different ways, which affects whether a white back is a dominant or recessive trait, and thus the rate of adaptation.
The disorder is caused by an inherited X-linked recessive trait, with the defective gene located on the X chromosome, inherited by boys from their carrier mothers.