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 [...]
In this article we will discuss about Meiosis which is a type of indirect cell division:- 1. Subject-Matter of Meiosis 2. Types of Meiosis 3. Meiocytes 4. Process 5. Significance. Contents: Subject-Matter of Meiosis Types of Meiosis Meiocytes Process of Meiosis Significance of Meiosis 1. Subject-Matter of Meiosis: In the sexually reproducing organism two sex cells or gametes containing haploid [...]