Theory of germplasm - pre-mendelian theory, Biology

Assignment Help:

Theory of Germplasm

(i)         'August Weismann' (1889) suggested the theory of continuity of germplasm.

(ii)         He referred to the reproductive cells as germplasm and to rest of the body as somatoplasm.

(iii)        The germplasm forms the bridge of life and passes from one generation to the next.

(iv)        In each generation it also produces the somatoplasm. Soma is 'Mortal' because it eventually dies and disintegrates, the germ is "immortal", because is continues forever.

(v)         According to Weisman the germ cells have genetic units ids or determinates.

(vi)      He rejected the theory of pangenesis. Thus first time a proper distinction was made between heritable and environmental variation on the basis of this principle.


Related Discussions:- Theory of germplasm - pre-mendelian theory

What are taenias and diseases caused by them, Q. What are taenias? What are...

Q. What are taenias? What are the diseases caused by them? The Taenias, as well know as tapeworms, are platyhelminth animals (flatworms). The major diseases caused by taenias a

Vertebrata, VERTEBR A T A It is divided into two parts -        1. ...

VERTEBR A T A It is divided into two parts -        1. Agnetha                    2. Gnetha S.No. C haracter A gnetha G

How is price mechanism or supply and demand concerned, How is price mechani...

How is price mechanism or supply and demand concerned?   The price mechanism or supply and demand: The price mechanism or supply and demand is concerned with how buyers

Structure of proteins, STRUCTUR E OF PROTEINS Proteins which are mixed...

STRUCTUR E OF PROTEINS Proteins which are mixed polymers of amino acids can have up to four structural levels - Primary, Secondary, Tertiary, Quaternary 1 .       PRIMA

Define hexokinase, Hexokinase, that catalyzes the first irreversible step o...

Hexokinase, that catalyzes the first irreversible step of glycolysis, is inhibited by glucose 6-phosphate.   Thus  when  PFK  is  inhibited and  fructose  6-phosphate builds  up an

Determine the food sources of pyridoxine, Determine the Food Sources of Pyr...

Determine the Food Sources of Pyridoxine? Raw foods contain more of this vitamin than cooked foods. The food sources include: 1. Rich sources: Rice polishing s, wheat bran,

Material basis of primitive life, Material Basis of Primitive Life: In ...

Material Basis of Primitive Life: In  the primitive society, human beings invented tools for catching animals, and for collecting, transporting and even preparing food.  They l

How do derived characters help cladistic taxonomists, How do derived charac...

How do derived characters help cladistic taxonomists determine phylogenetic relationships? A derived character is found only between members of a particular group. Thus, cladi

What is the proper name for edta and what is it, What is the proper name fo...

What is the proper name for EDTA and what is it? EDTA is ethylenediamine tetraacetic acid. It is a tough chelating agent. It has many uses containing: 1) Industrial cleaning

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