mutation theory regarting mutation

Since Darwin's theory failed to explain certain facts, particularly the source of variations, several scientists started looking for bridging the lacuna in the theory. One such effort is the mutation theory proposed by Victor Hugo DeVries in 1902. According ..

Mutation - Mutation is defined as a chemical change in the DNA structure of a gene. A difference of a single base in the DNA molecule or a single error in the reading of the code can cause a change in the amino acid sequence which leads to mutation. The chemical substa..

Some "green genes" randomly mutated to "brown genes". But this process alone can account for the change over the gene frequency in just one generation because mutation is rare and occurs under severe conditions only. ..

According to this theory genetic mutations occur and accumulate with increasing age, causing cells to deteriorate and malfuncti..

Mutation Breeding - Mutations are defined as heritable changes in structure number of genes or chromosomes. Mutations can be natural (spontaneous) or induced. Many natural mutations are recorded. But, stability of mutant expression needs a thorough testing ov..

Mutations are defined as heritable changes in structure number of genes or chromosomes. Mutations can be natural (spontaneous) or induced. Many natural mutations are recorded. But, stability of mutant expression needs a thorough testing over generations, as many ..

Beneficial Mutations - Crop - Reported benefits after mutations Barley - Reduction in height, increased yield and day neutrality Groundnut - Improved oil content Wheat - Grain colour improved Rice - dwarfing, increased yield. In India, g induced mutations are carried o..

They are mutation involving change in number or structure of chromosomes. Change in number of chromosomes induced by mutagens can lead to aberrant gametes, which when fuse with normal gamete lead to aneuploid zygotes. Changes in chromosomal structure by mutation are brought abo..

Mutations by use of chemical mutagens can be induced at cell level during the tissue culture and beneficial mutants could be used to desirable plants. Mutant cells can result into mutant plants and if they carry desirable characters, they could be used for further breeding processes. On ..

This theory blames the external or environmental forces that gradually damages the internal cells and organs leading to ageing. This theory includes Living theory Free radius theory Cross linking theory Wear and tear theory Theory..