Theories to explain fine structure of chromosome, Biology

THEORIES TO EXPLAIN FINE STRUCTURE OF CHROMOSOME

(1) Multistranded theory

Steffenson 1959 - each chromosome composed of two chromatids (Half Chromosome) and each chromatid composed of 16 DNA molecules.

(2) Folded fibril theory

Du Praw 1965 - Chromosome consist of single DNA variously folded to form two Chromatids.

(3) Unineme theory

Hans Ris (1967) - Each Chromosome consists of two chromatids and each chromatid have one DNA molecule.

This theory is most acceptable as it is supported by meiosis and crossing over studies.

Posted Date: 10/8/2012 3:10:34 AM | Location : United States







Related Discussions:- Theories to explain fine structure of chromosome, Assignment Help, Ask Question on Theories to explain fine structure of chromosome, Get Answer, Expert's Help, Theories to explain fine structure of chromosome Discussions

Write discussion on Theories to explain fine structure of chromosome
Your posts are moderated
Related Questions
Define Barrier layer cells (photocells) They are the very simple of the detectors. It contains the bottom support layer of conductive metal like iron. A photosensitive layer of

Describe the nature of the enzymes involved in the phosphorylation of glucose Phosphorylation of glucose: Glucose is converted to glucose-6-phosphate since phosphorylated inter

Define Effect of Deficiency of chromiumin humans? Hallmark of marginal chromium deficiency is impaired glucose tolerance. Individuals receiving TPN without chromium have been s

Explain the Membrane Equilibria? A semipermeable membrane used to separate two liquid phases can, in principle, be permeable to certain species and impermeable to others. A mem

For an individual having a genotype formed of two different alleles that condition different varieties of the same phenotypical trait, upon what will the phenotypical feature actua

Chemotaxis - Modes of Cell Movement Chemotaxis considers to me directed movement of cells in response to a concentration gradient of a chemical factor in solution. An instance

Q. What is mitral stenosis? Most common cause of mitral stenosis is rheumatic fever. Nearly 30 per cent of patients with rheumatic fever may go on to develop pure mitral valve

What is the meaning of Paraplegia Paraplegia (from the Greek para, "alongside of," and plegia,  "stroke") is a condition in which both lower limbs are paralyzed (quadriplegia i

1. Write general characters of phylum mollusca and classify it upto classes, giving at least two examples of each class.

Define Structural Elements - Biological Functions of Proteins? Structural proteins are fibrous proteins. The well known of the fibrous proteins are possibly the keratins, which