The following points highlight the four main types of permanently specialized chromosomes. The types are: 1. Nucleolar Chromosomes 2. Sex Chromosomes 3. B Chromosomes 4. Chromosomes with Diffuse or Multiple Centromeric Regions. Permanently Specialized Chromosomes: Type # 1. Nucleolar Chromosomes: The chromosome forming the nucleolus (plural = nucleoli) is called the nucleolar chromosome. Normally one or more chromosomes in the [...]
The following points highlight the six main parts of a chromosome. The parts are: 1. Pellicle and Matrix 2. Chromatids, Chromonema and Chromomeres 3. Centromeres 4. Secondary Constriction 5. Satellite 6. Telomere. Part # 1. Pellicle and Matrix: A membrane which surrounds each chromosome is said as pellicle. A jelly substance present inside the membrane is called as matrix. Presumably [...]
The following points highlight the top five characteristics of chromosome. The characteristics are: 1. Chromosome Number 2. Chromosome Size 3. Morphology 4. Behaviour at Meiosis 5. Banding Patterns. Characteristic # 1. Chromosome Number: The number of chromosomes in a species is usually constant and this makes it an important taxonomic character. However there are exceptions where chromosome number varies. These [...]