Customer Service Chat
Get quote & make Payment
Theory of germplasm, Biology
Y OF GERMPLASM -
August Weismann (1834-1914) criticized the inheritance of acquired characters by putting forward the theory of continuity of germplasm.
According to this theory, the characters of influencing the germ cells are only inherited.
There is a continuity of germplasm (protoplasm of germ cells) is not transmitted to the next generation hence it does not carry characters to next generation.
Weismann disproved the inheritance of acquired characters by cutting off the tails of rats for about 20 generations and allowed them to breed but tailless rats were never born.
Weismann stated that organisms comprises of two types of protoplasm - the germplasm, the protoplasm present in germ cells only and which is passed on to the offsprings, and the somatoplasm, the protoplasm forming remain of the body part and plays no role in heredity.
Darlington commented - "Lamarck's theory is an evergreen superstition".
S AGAINST THE THEORY -
Muscles of arms and shoulder in blacksmiths.
Circumcison of foreskin of penis in jews and muslims.
Piercing of ear -lobe in Indian women.
Shaving of beard in man.
The wrestler's powerful muscles are not transmitted to the offsprings.
Chinese women used to wear iron shoes in order to have small feet, but their children at the time of birth always normal feet.
Posted Date: 10/9/2012 1:02:23 AM | Location : United States
Ask an Expert
Theory of germplasm, Assignment Help, Ask Question on Theory of germplasm, Get Answer, Expert's Help, Theory of germplasm Discussions
Write discussion on Theory of germplasm
Your posts are moderated
Write your message here..
How many alleles of genes that condition x-linked traits do, How many allel...
How many alleles of genes that condition X-linked traits do female and male individuals respectively present? For every correspondent gene to an X- linked trait women present a
Biodiverse ecosystems of economic application, Q. What are some economic ap...
Q. What are some economic applications that can be generated by very biodiverse ecosystems? Extremely biodiverse areas present huge economic potential and they can be a source
Describe the applications of vitamin B1, Describe the Applications of vitam...
Describe the Applications of vitamin b1 The steadily increasing consumption of white flours (insufficiently ground and thus low in vitamin content) by large sections of the po
Lysosomes, explain polymorphism in lysosomes
explain polymorphism in lysosomes
Oogenesis, - Oogenesis involves the formation of haploid cells from an orig...
- Oogenesis involves the formation of haploid cells from an original diploid cell, called a primary oocyte, through meiosis. - The female ovaries contain the primary oocyte. The
Harshey-chase experiement, What is the Harshey-chase experiement .explain i...
What is the Harshey-chase experiement .explain in detail
Scientific method, SCIENTIFI C METHOD - The scientific approach to exp...
SCIENTIFI C METHOD - The scientific approach to explain a particular phenomenon require a series of organized steps based on common sense. It is called scientific method. A
Describe paradoxical and reverse split s in second heart, Describe Paradoxi...
Describe Paradoxical and Reverse Split S in second heart sound? Sequence of seminar valve closure reversed i.e. P, proceeds A. A reversed split is nearly always due to delayed
Why the l enantionmer is more dominant, In the Miller-Urey experiment, amin...
In the Miller-Urey experiment, amino acids of bothe the L and D enantionmers. Why is it that the L enantionmer is more dominant in living things?
Divergence - mechanism of gastrulation, DIVERGENC E - In it blastom...
DIVERGENC E - In it blastomeres move in different directions i.e. inside the blastocoel the blastomeres move in different directions. The blastomeres which move inside i
Accounting Assignment Help
Economics Assignment Help
Finance Assignment Help
Statistics Assignment Help
Physics Assignment Help
Chemistry Assignment Help
Math Assignment Help
Biology Assignment Help
English Assignment Help
Management Assignment Help
Engineering Assignment Help
Programming Assignment Help
Computer Science Assignment Help
IT Courses and Help
Why Us ?
~24x7 hrs Support
~Quality of Work
~Time on Delivery
~Privacy of Work
Human Resource Management
Literature Review Writing Help
Follow Us |
T & C
Copyright by ExpertsMind IT Educational Pvt. Ltd.