Neo darwinism or synthetic theory of evolution, Biology

Assignment Help:

NEO DARWINISM OR SYNTHETIC THEORY OF EVOLUTION -

  1. It is the synthesis of the ideas of Neo Darwinians as a new theory of evolution based upon recent findings of genetics and molecular biology.
  2. Thus, Neo-Darwinism has emerged as the mathematically based Modern Synthetic Theory of Evolution designated by Huxley (1942).
  3. Muller, Dobzhansky, Fisher and Wright are also the main contributors.
  4. G.L.Stebbins (1966-76) gave this theory in present form as follows -

Five factors have been identified as main bases. First is gene mutation, second is chromosomal changes and third is genetic recombination to cause genetic variability. These changes are then acted upon by natural selection and reproductive isolation which guide the population into adaptive channels.

There are also accessory factors like gene migration and hybridization to increase the genetic variability. Lastly the chance factors (genetic drift) in small population is also relevant in the evolution of the new species.


Related Discussions:- Neo darwinism or synthetic theory of evolution

Explain about the supply curve or supply schedule, Explain about the supply...

Explain about the supply curve or supply schedule. The supply curve or schedule shows the total quantity of a good or a service supplied within aggregate, by whole sellers or f

Values of dpd for plant cells under hypertonic media, Q. What are the value...

Q. What are the values of DPD for plant cells under hypertonic, hypotonic and isotonic media? In plant cells under hypertonic medium there is loss of water for the external, SF

Describe ts murmur and their characterstic, Describe TS Murmur and their ch...

Describe TS Murmur and their characterstic ? Characteristic: It is a rumbling, and diastolic murmur heard at left lower sterna border that increases with inspiration. An OS may

Mention the role o ribosome in peptide, Mention the role o ribosome's in pe...

Mention the role o ribosome's in peptide -bond formation .How does ATP facilitate it? a) Of springs derived by asexual reproduction are known as clones. Justify giving two R

Explain the primary root growth, Explain the Primary Root Growth? Prim...

Explain the Primary Root Growth? Primary Growth in Roots :  Roots grow down and through the soil by adding new cells at the tip of the root (called the root tip). There is a

Metamorphosis in amphibians, Metamorphosis in Amphibians Metamorphosi...

Metamorphosis in Amphibians Metamorphosis is radical in anurans, slight or not exists in urodeles. In anuran amphibians like toads and most frogs, metamorphosis is generally

How can amine groups be classified, How can amine groups be classified? ...

How can amine groups be classified? Amines can be classify into primary amines, those to which one -R (variable radical) is attached to a -NH2, secondary amines, those where on

Branchiostoma, What is the feeding habitat of branchiostoma?

What is the feeding habitat of branchiostoma?

What is muscular dystrophy, What is Muscular dystrophy Muscular dystro...

What is Muscular dystrophy Muscular dystrophy :- Defects in the muscle due to faulty nutrition.

What would be the probability of obtaining result, A plant grown from one o...

A plant grown from one of Mendel's yellow peas is selfed. Five progeny peas are obtained from this self and they are all yellow. If the original selfed plant had been homozygous, w

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