Terminology
In animal and plant breeding, the common ancestor reproduction The offspring obtained. The family in plant breeding refers to the offspring produced by self crossing of one individual selected from the population, or the offspring produced by crossing of two individuals, or the offspring produced by one individual (judged according to the female parent rather than the male parent), etc. The families produced by inbreeding at different levels are bred separately, and then selected among families. In medical genetics, it refers to the investigation of the incidence of a genetic disease among family members who are close to each other. Genealogical analysis Helps differentiate Monogenic disease and Polygenic disease 。 Secondly, due to genetic heterogeneity, genetic diseases with the same or similar phenotypes can often be differentiated by different genetic modes. Therefore, pedigree analysis is also helpful to distinguish some genetic diseases with similar phenotypes and different subtypes of the same genetic disease. Pedigree analysis needs to combine symptoms, signs, laboratory tests and necessary auxiliary tests to make a diagnosis of diseases.
At the same time, all seeds produced on the same plant belong to the same family.
