Analysis of genomic equivalence of nuclei, Biology

Analysis of Genomic Equivalence of Nuclei

Towards the ending of 19th century August Weismann had proposed that during cleavage the genetic determinants (later shown to be chromosomes) were parceled out between different blastomeres in some manner that determined the path of differentiation that a given cell might take. As per to this theory only the germ cells contained all the genetic determinants and the several somatic cell types differed in the genetic determinants that they contained. In other words, the nuclei of only the germ cells consist of all the genes and have a complete genome, whereas the nuclei of dissimilar somatic cells may contain only those genes that are needed for their specific type of differentiation.

However, on the basis of many studies it is believed that in an organism nuclei of all cells of the body consist of a complete and identical set of all the genes as that in the original nucleus of the zygote. It means that the genomes of all cells and the zygote are equal. Development involves utilization of different genes from this common genome through each cell type for its own particular type, of differentiation. This belief in genomic equivalence of nuclei of all cells is supported through a fair amount of evidence of both genetic and embryological nature. It has been found that particular number of chromosomes, on which genes are arranged, is constant throughout all the dissimilar tissues of the adult organism. The DNA, the carrier of genetic information, extracted from different somatic tissues has identical composition and properties. It has been shown that in the larvae of Chironomus and as well Drosophila the number of chromosomes and their banding pattern (pointing out the number of genes) are constant in all cells.

Posted Date: 1/29/2013 12:12:28 AM | Location : United States







Related Discussions:- Analysis of genomic equivalence of nuclei, Assignment Help, Ask Question on Analysis of genomic equivalence of nuclei, Get Answer, Expert's Help, Analysis of genomic equivalence of nuclei Discussions

Write discussion on Analysis of genomic equivalence of nuclei
Your posts are moderated
Related Questions
Explain Procedure for Capsule Staining in a Culture? We have learnt that Capsule staining can be undertaken either by negative staining or Anthony method. Now carry out the exe

Explain Lyme disease The disease - About 70-80% of patients infected by B. burgdorferi develop the characteristic skin lesion, erythema migrans, which occurs at the site of the

What is Tagma, Tagmosis and Tagmatization? Distinct body regions resulting when different segments of a metameric animal become involved in specific functions. These segments a

Explain the Importance of Vitamin E Vitamin E has a pronounced antioxidizing effect. Because of this property, vitamin E decreases the basic metabolism of the tissues or the ox

how a simple medium can be converted into selective differential and enriched medium?

Principles of Isolated soybean proteins The basic principles of ISP production are simple. Soybean protein isolates are obtained by selective solubilisation of  the protein (e.


Characteristics Define Cancer - Hyperplasia Hyperplasia is the extreme proliferation of cells which can be observed in normal as well as cancerous tissues. In normal tissue, a

Explain the Steps of Exercise You have learnt the steps of exercises in Block 3, Unit 1 of theory block. Let us review the steps. In aerobic exercises one has to under go fo

Explain the Bulimia Nervosa? Diagnostic Criteria Bulimia Nervosa patients, unlike those of anorexia nervosa with binge and purge subtype, are typically within the normal weight