Theories to explain fine structure of chromosome, Biology

Assignment Help:

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.


Related Discussions:- Theories to explain fine structure of chromosome

Centrosome, structure of centrosome and work

structure of centrosome and work

Blood vessels - circulation, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

What are the genotypes of a man with normal pigment, 1. A man with normal p...

1. A man with normal pigment, whose father was an albino, marries an albino. What chance is there that their first child will be an albino? 2. A man with normal pigment marries

Biochemical production, Plants are the source of a large variety of bioche...

Plants are the source of a large variety of biochemicals which are metabolites of both primary and secondary metabolism. But secondary metabolites are of much greater interest s

Explain polyenes - amphotericin b, Polyenes: amphotericin b Amphoterici...

Polyenes: amphotericin b Amphotericin B products are the only polyenes currently available for systemic treatment of fungal infections.  Nystatin, another polyene, is only avai

What is bathing in cerebro-spinal fluid, Q. What is bathing in Cerebro-Spin...

Q. What is bathing in Cerebro-Spinal Fluid? The CNS is bathing in Cerebro-Spinal Fluid (or CSF):  similar to plasma, less protein, rich in ascorbic acid, different in ions Na+

Adenine, Adenine is one of the four nitrogen-containing bases occurring in...

Adenine is one of the four nitrogen-containing bases occurring in the nucleotides, the building blocks of organic macromolecule group called as nucleic acids (DNA and RNA). Adenin

A leaf is detached from a tree and tested with iodine, A leaf is detached f...

A leaf is detached from a tree and tested with iodine. The leaf turns dark blue.    (a) What does this result tell you?    (b) Why is this result not sufficient e

Classification of living beings, Q. What is the Biology field that studies ...

Q. What is the Biology field that studies the classification of living beings? The Biology field that studies the classification of living beings is termed as Taxonomy. Q.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd