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Extranuclear inheritance (also known as cytoplasmic inheritance) is a form of non-Mendelian inheritance also first discovered by Carl Correns in 1908. [9] While working with Mirabilis jalapa, Correns observed that leaf colour was dependent only on the genotype of the maternal parent.
Carl Erich Correns and Erwin Baur, in separately conducted researches on Pelargonium and Mirabilis plants, observed a green-white variation (later found as the result of mutations in the chloroplast genome) that did not follow the Mendelian laws of inheritance. Nearly twenty years later, non-mendelian inheritance of a mitochondrial mutation was ...
A polygene is a member of a group of non-epistatic genes that interact additively to influence a phenotypic trait, thus contributing to multiple-gene inheritance (polygenic inheritance, multigenic inheritance, quantitative inheritance [1]), a type of non-Mendelian inheritance, as opposed to single-gene inheritance, which is the core notion of Mendelian inheritance.
In genetics, paternal mtDNA transmission and paternal mtDNA inheritance refer to the incidence of mitochondrial DNA (mtDNA) being passed from a father to his offspring. . Paternal mtDNA inheritance is observed in a small proportion of species; in general, mtDNA is passed unchanged from a mother to her offspring, [1] making it an example of non-Mendelian inh
One of the most noteworthy aspects of plasmagenes is their involvement in non-Mendelian inheritance patterns. Unlike nuclear genes, which are inherited from both parents, plasmagenes are typically inherited maternally. This occurs because cytoplasmic organelles, like mitochondria, are transferred primarily through the egg cell during fertilization.
The expected phenotypic ratio of crossing heterozygous parents would be 9:3:3:1. [1] Deviations from these expected ratios may indicate that the two traits are linked or that one or both traits has a non-Mendelian mode of inheritance.
The challenge of a complete theory of population genetics is to provide a set of laws that predictably map a population of genotypes (G 1) to a phenotype space (P 1), where selection takes place, and another set of laws that map the resulting population (P 2) back to genotype space (G 2) where Mendelian genetics can predict the next generation ...
This uniparental inheritance is an example of non-Mendelian inheritance. Plants also show uniparental mtDNA inheritance. Most plants inherit mtDNA maternally with one noted exception being the redwood Sequoia sempervirens that inherit mtDNA paternally. [46] There are two theories why the paternal mtDNA is rarely transmitted to the offspring ...