Evidence in favour and against of mutation theory, Biology

EVIDENCE IN FAVOUR OF THE MUTATION THOERY -

Mutation theory can explain both progressive and retrogressive evolution and the occurrence of both changed and unchanged forms.

Example of Mutation

1. Ancon sheep is a short lagged variety, which appear suddenly.

2. Development of hornless cattle from homed cattle.

3. Hairless cats and double toed cats have developed through mutations.

4. Development of delicious Apple, Noval orange, Red sunflower.

EVIDENCES AGAINST THE MUTATION THEORY -

1.       The mutation are rare occurrence. Hence it is doubtful all new character shown by animals and plants could appear by mutation.

2.       Evening Primrose of de Vries was not a normal plant but a complex heterozygous form with chromosome aberrations.

3.       Mutations are mainly retrogressive or negative.

4.       Mutations are generally recessive while traits taking part in evolution are usually dominant.

5.       Mutation theory can't explain the development of mimicry, mutual dependence of flowers and pollinating insects.

6.       Mutation theory does not explain the role of nature.

Posted Date: 10/9/2012 1:28:20 AM | Location : United States







Related Discussions:- Evidence in favour and against of mutation theory, Assignment Help, Ask Question on Evidence in favour and against of mutation theory, Get Answer, Expert's Help, Evidence in favour and against of mutation theory Discussions

Write discussion on Evidence in favour and against of mutation theory
Your posts are moderated
Related Questions
What is the role of Stomach in human body? The stomach serves both to digest food and to hold it so that it can be gradually released into the small intestine. Food stays in th

List and briefly describe the mechanisms that prevent acid-base imbalances from appearing in the body. In addition, indicate where each mechanism functions most significantly.

Another important genus of mycotoxin producers is Fusarium, many species of which produce members of the trichothecene family of mold metabolites like deoxynivalenol, neosolaniol a


F a c t o r s responsible for transboundary diseases Factors that affect the entry, establishment and spread of animal diseases include globalization; human population gr

Applications of microbiology in different fields

What is Fehling's test - Reduction Tests? This test is answered by all reducing sugars which possess a free aldehyde or ketone group. All monosaccharides possess a free aldehyd

Q. What are the cytoplasmic inclusions? Cytoplasmic inclusions are cytoplasmic molecular aggregates, such as organic polymers, pigments and crystals. They are not considered ce

what is allele