In this article we will discuss about the types and parts of nucleus in plants. Types of Nucleus: 1. Uninucleate cell: It is also referred to as monokaryotic cell, mostly plant cell which contain single nucleus. 2. Bi-nucleate cell: It is also called as dikaryotic cell, which contains 2 nucleus at a time. Example is (i) Paramecium (mega and micronucleus) [...]
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 [...]
In this article we will discuss about:- 1. Meaning of Chromosomes 2. Number of Chromosomes 3. Size 4. Chemical Composition 5. Functions 6. Special Types. Meaning of Chromosomes: Chromosomes are the most important constituents of the nucleus and were first observed by Holfmeister (1848) in pollen mother cell of Tradescantia and called it nuclear filaments. Chromosomes are filamentous bodies which [...]