- Simulation of dominant inheritance of a recessive trait, e.g., a heterozygote mating with an affected homozygote resulting in the manifestation of the recessive trait generation after generation. SYN: false dominance, pseudodominance.
* * *qua·si·dom·i·nance (kwah″ze-domґĭ-nəns) [quasi- + dominance] the mimicking of dominance in inheritance, with roughly half of the offspring expressing a phenotype, but actually caused by mating of a carrier of a recessive gene with an individual homozygous for the gene; it can be distinguished from dominance by examination of an extended pedigree. quasidominant adj
Medical dictionary. 2011.
Look at other dictionaries:
dominance — The state of being dominant. cerebral d. the fact that one hemisphere is dominant over the other and will exercise greater influence over certain functions; the left cerebral hemisphere is usually dominant in the control of speech … Medical dictionary
pseudodominance — SYN: quasidominance. * * * pseu·do·dom·i·nance däm ə .nən(t)s n appearance of a recessive phenotype in a heterozygote containing the recessive gene on one chromosome and a deletion or only part of the dominant gene on the corresponding part of… … Medical dictionary
Quasidominant — Pattern of inheritance that seems due to a dominant trait but is in fact due to the mating of a person who has a recessive disorder (with two copies of a gene causing the disease) with someone who is an asymptomatic carrier (with one copy of the… … Medical dictionary
oculocutaneous albinism — (OCA) albinism characterized by partial or total absence of melanin from the melanocytes of the skin, hair, and eyes, with additional ocular defects including hypoplastic fovea, photophobia, nystagmus, and decreased visual acuity. There are a… … Medical dictionary