number of chromosomes

The number of chromosomes is fixed for a given species. It varies from a minimum of two to several hundreds in different species of plants and animals. All individuals of a given species show the same chromosome number in all their body cells. The number..

Eukaryotic Chromosome - The eukaryotic cells show a varied number of chromosomes. It is presumed to be the result of breaking up of a single long chromosome into several short units, in the course of evolution, to accommodate the increase in the amount of gen..

The eukaryotic cells show a varied number of chromosomes. It is presumed to be the result of breaking up of a single long chromosome into several short units, in the course of evolution, to accommodate the increase in the amount of genetic information. The eukary..

They are mutation involving change in number or structure of chromosomes. Change in number of chromosomes induced by mutagens can lead to aberrant gametes, which when fuse with normal gamete lead to aneuploid zygotes. Changes in chromosomal structu..

The size of chromosomes varies from species to species. In the same species, all the chromosomes occurring in a given cell will not be of the same size. However, in most organisms, chromosomes fall in the size range of 0.1 to 30 μm in length and 0.2 to 2.0 μm ..

The first meiotic division or meiosisI is commonly described as reductional division since at the end of this division the two resulting daughter cells will have half the number of chromosomes as that of the parent ce..

Meiosis is a cell division occurs in reproductive cells (gametes). The male gamete is known as the sperm in animals and the female gamete is known as the ovum (egg). These gametes, after they are formed, have no future unless they unite to form a zygote, which then grows into an adult organism. The..

An organism, in which number of complete chromosome sets is more than the diploid number is called polyploi..

This type of cell division occurs in reproductive cells (gametes). The male gamete is known as the sperm in animals and the female gamete is known as the ovum (egg). These gametes, after they are formed, have no future unless they unite to form a zygote, which then grows into an adult organism. The..

The centromere splits and two chromatids in each chromosome start moving away from each other. Finally, they reach the poles of the cell. Each pole now has haploid number of chromosomes and half the amount of DN..