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 [...]
The below mentioned article provides a study note on the Artificial Induction of Polyploidy. In recent years, a number of methods have been worked out to induce polyploidy in plants. Some of them are described below: 1. By Radiation: Polyploidy can be induced in plants by exposing their certain parts, such as vegetative buds and flower buds, to radiations of [...]