The below mentioned article provides a study note on Genetics of Plastids. In the cytoplasm of the plant cells are found many small cytoplasmic bodies, called plastids. These plastids are of several types, such as, chloroplast, leucoplast, chromoplast and so on. Plastids arise from smaller particles, the proplastids, found in the egg cytoplasm. They reproduce themselves independently of other cell [...]
In this article we will discuss about the Inheritance of Shell Coiling in Snail. One of the classical examples of intricate relationship between maternal genotype and egg cytoplasm "phenotype" was studied in snails by Sturtevant. He showed that there are two strains of water snails (limnaea peregra) that differ each other in the direction of coiling of shell. Looking into [...]
In this article we will discuss about the Cytoplasmic Inheritance of Kappa Particles in Paramecium. One of the most striking and spectacular cases of cytoplasmic inheritance occurs in paramecium aurelia. In 1938, T.M. Sonneborn reported that some strains contain kappa particles in the cytoplasm and are known as "Killers ". Kappa particles are about 2 μ x in diameter and [...]