The frequency of certain genes in a population changed in one generation. This is the essence of the idea of evolution.

True

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False

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Solution

The correct option is A True
When the frequency of occurrence of certain genes in a population changes, it paves the pathway for evolution, where it marks a change in the upcoming generation traits. Evolution is change in the heritable traits of biological populations over successive generations. Evolutionary processes give rise to diversity at every level of biological organisation, including the levels of species, individual organisms and molecules.

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Question 9
Select the incorrect statement

(a) Frequency of certain genes in a population change over several generations resulting in evolution.
(b) Reduction in weight of the organism due to starvation is genetically controlled.
(c) Low weight parents can have heavyweight progeny.
(d) Traits which are not inherited over generations do not cause evolution.

Q. Evolution is a change in the gene frequencies in a population in responseto changes in the environment in a time scale of years and not centuries. Justify this statement with reference to DDT. How does the theory of Hugo de Vries support this?

Change in frequency of alleles in a population results in evolution, is proposed in:

Q. A student runs a simulation to examine allele frequencies in a population over 20 generations. In the initial trial, the student sets the population size to 200, and there is no natural or sexual selection, gene flow, or mutations. In this trial, there was not a significant change in the allele frequencies.
In the next trial, the student sets the population size to 50. All other parameters are the same as the first trial. In this trial, the student observes a significant change to the allele frequencies.
What is the cause of evolution in this population?

The spread of genes from one breeding population to another by migration which may result in change in gene frequency is:

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