Mutation theory, Biology

MUTATION THEORY (Hugo de Vries 1901) -

  • New species are not formed by continuous variations but sudden appearance of variations i.e., mutation. Mutation are heritable and persist in successive generations.
  • Normal Plant Evening Primrose (Oenothera lamarckiana) About 50,000 specimens (Self pollination) 

168_mutation theory.png

FEATURES OF MUTATION THEORY -

  • Mutation or sports or discontinuous variations are the raw material of evolution, which appear all of a sudden and heritable.
  • Mutants varieties are marked different from the parents and there are no intermediate stages between the two.
  • The same mutation appears again and again to increase the chances of selection by nature.
  • A single mutation may produce a new species.
Posted Date: 10/9/2012 1:27:21 AM | Location : United States







Related Discussions:- Mutation theory, Assignment Help, Ask Question on Mutation theory, Get Answer, Expert's Help, Mutation theory Discussions

Write discussion on Mutation theory
Your posts are moderated
Related Questions
What are the main functions of the blood? The blood is a means of substance transportation all by the body. The blood distributes nutrients, oxygen, antibodies, hormones, and c

Ask Two true-breeding pea plants were crossed. One parent is round, terminal, violet, constricted, while the other expresses the respective contrasting phenotypes of wrinkled, axia

What are the genotypes and respective blood types of the ABO system? Since the alleles are IA, IB and i the possible genotypes are IAIA (blood type A), IAIB (blood type AB), IB

why does an organism internal environment change

Define the Interaction of Vitamin C with iron? Ascorbic acid powerfully enhances absorption of non- haem iron and reverses the inhibiting effect of tea and calcium phosphate. I

Assessment   The child with wilm's tumour will present you with a large mass in the loin or an enlarging abdomen. This mass may be noticed accidently by  the parent of  the chi

What Devices Used for Oxygen Therapy? Variable performance systems: With these devices, the FiO 2 would vary depending on the patient's breathing pattern. In general, rapid, s

What is Fontan Operation and Modifications ? Earlier reported to have 20 per cent mortality, it has come down to five per cent in specialized centres. In the earlier series th

In genetic recombination by crossing over what is the difference between parental gametes and recombinant gametes? Parental gametes are those gametes that keep the original lin

Q. What are the various biological examples in which lysosomic enzymes play a fundamental role? The remodelation of the osseous tissue, the function of the elimination of the t