Question

notes on cytotaxonomical approach

Answer 1

Cytotaxonomy is the branch of biology dealing with the relationships and classification of organisms using comparative studies of chromosomes.

Description

Cytotaxonomy is branch of taxonomy,which uses the characteristics of cellular structures,such as somatic chromosome to classify organism.improvement in the cytological techniques permit chromosomal studies.The Study of primate chromosome is another very active field,which provide very much information on relationships(chiarelli,1996). The number, structure, and behaviour of chromosomes is of great value in taxonomy, with chromosome number being the most widely used and quoted character. Chromosome numbers are usually determined at mitosis and quoted as the diploid number (2n), unless dealing with a polyploid series in which case the base number or number of chromosomes in the genome of the original haploid is quoted. Another useful taxonomic character is the position of the centromere. Meioticbehaviour may show the heterozygosity of inversions. This may be constant for a taxon, offering further taxonomic evidence. Cytological data is regarded as having more significance than other taxonomic evidence.

Answer 2

A biological branch that deals with chromosomes for the classification and relationship of an organism as it considers that the properties of chromosomes have greater values in an organism.

Classification is Cytotaxonomical approach.

It has been divided into three main parts. They are  

The genetic complement

DNA Hybridization

Karyalogical studies.

Significance:

As the process deals with the comparative studies of chromosomes, cytotaxonomy plays an important role in taxonomical studies. This method of classification and relationship analysis can establish some minute variation in any individuals. This method also classifies an organism based on their function and DNA structure.