The following points highlight the three special types of chromosomes. The types are: 1. Polytene Chromsomes or Salivary Gland Chromosomes 2. Lampbrush Chromosomes 3. Prokaryotic Nucleoids. Type # 1. Polytene Chromsomes or Salivary Gland Chromosomes: The giant chromosomes were first observed in the cells of salivary glands, gut, trachea and other body parts of dipteran insects by E.G. Balbiani in [...]
The below mentioned article provides an overview on Chromosomes in the Nucleoplasm:- 1. Subject-Matter of Chromosomes 2. Historical Note of Chromosomes 3. Number 4. Morphology 5. Size 6. The Structure of Eukaryotic Chromosomes 7. Principal Landmarks 8. Chromosome with Diffuse kinetochore and Polycentric Chromosome. Contents: Subject-Matter of Chromosomes Historical Note of Chromosomes Number of Chromosomes Morphology of Chromosomes Size of [...]
In this article we will discuss about the Variations in Chromosome Number to Plant and Animal. Every cell in the body of living organism is provided with a packet of genetic material (the nucleus) which contains chromosomes. The number of chromosomes in the nuclei of a given species is fixed. Some species of plants and animals have identical chromosome numbers. [...]