A type of chromosome rearrangement involving the exchange of chromosome segments between two chromosomes that do not belong to the same pair of chromosomes.
A specific reciprocal translocation might, for example, involve the swap of material between chromosomes 1 and 19.
- Translocation, Robertsonian
A relatively very common and medically significant type of chromosome rearrangement that is formed by fusion of the whole long arms of two acrocentric chromosomes (chromosomes with the centromere near the very end). One in about 900 babies is born with a Robertsonian translocation making it the most common kind of chromosome rearrangement known in […]
- Transmissible spongiform encephalopathy
kuru; Creutzfeldt-Jakob disease; Gerstmann-Straussler syndrome; fatal familial insomnia; variant Creutzfeldt-Jakob disease (vCJD).
- Transmission distortion
meiotic drive which is preferential selection during meiosis (germ cell production); gametic selection which is preferential selection of gametes (germ cells) ; and postzygotic viability which reflects differences in the ability of conceptions to survive. All of these mechanisms for selection result in the production of offspring in proportions that deviate from Mendelian predictions. For […]
- Transmission, perinatal
Transmission of a disease-causing agent (a pathogen) from mother to baby during the perinatal period, the period immediately before and after birth. The perinatal period is defined in diverse ways. Depending on the definition, it starts at the 20th to 28th week of gestation and ends 1 to 4 weeks after birth. The perinatally transmitted […]
- Transmission, vertical
Passage of a disease-causing agent (pathogen) from mother to baby during the period immediately before and after birth. Transmission might occur across the placenta, in the breast milk, or through direct contact during or after birth. For example, HIV can be a vertically transmitted pathogen. Also known as perinatal transmission.