Question:
Variations caused by mutation, as proposed by Hugo de Vries, are:
Variations caused by mutation, as proposed by Hugo de Vries, are:
Updated On: May 18, 2024
- small and directional
- small and directionless
- random and directional
- random and directionless
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The Correct Option is D
Solution and Explanation
Hugo de Vries (1901) put forward the theory of evolution called mutation theory. He believed that mutation causes evolution. Mutations are discontinuous variations that are random and directionless.
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Concepts Used:
Evolution
Evolution is a process that occurs in changes in the genetic content of a population over time. Evolutionary change is generally classified into two: microevolution and macroevolution. The process of changes in allele frequencies in a population over time is a microevolutionary process. Three main mechanisms that cause allele frequency change are natural selection, genetic drift, and gene flow. On the other hand, macroevolution refers to change at or above the level of the species.