The following points highlights the five special types of chromosomes. The types are: 1. Polytene Chromosome or Giant Chromosome 2. B-Chromosome or Supernumerary Chromosome 3. Chimaera 4. SAT-Chromosome. Type # 1. Polytene Chromosome or Giant Chromosome: Object: To prepare acetocarmine squash of giant chromosome or polytene chromosome from salivary glands of Drosophila. Requirements: Drosophila melanogaster larvae. NaCl, acetocarmine solution (1%), [...]
Lecture notes on chromosome. After reading these notes you will learn about: 1. Introduction to Chromosome 2. Meaning of Chromosome 3. Number and Size 4. Structure and Morphology 5. Molecular Organization 6. Mechanism of Chromosome Condensation 7. Special Types 8. Karyotype Concept 9. Heterochromatin. Contents: Notes on Introduction to Chromosome Notes on the Meaning of Chromosome Notes on the Number [...]
The below mentioned article provides a study note on viral genomes. Viruses are a special class of infectious agents that are so small that they can be viewed only under electron microscope. A complete "viral particle" or "virion consists of a block of genetic material (DNA or RNA) surrounded by a protein coat and, sometimes by an additional membranous envelope. [...]