What can be inferred from a particular trait multiplied at a faster rate in a population over successive generations ?

there is change in environment

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there is change in frequency of specific genes

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variations are at work

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there is only phenotypic change and no genotypic change

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Solution

The correct option is B
there is change in frequency of specific genes

If a variation becomes common characteristic in the population then the frequency of an inherited trait changes over generations. Since genes control traits, we can say that the frequency of certain genes in a population changed over generations. Moreover, it can be inferred that the particular trait gives survival advantage.

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Question 9
Select the incorrect statement

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(b) Reduction in weight of the organism due to starvation is genetically controlled.
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(d) Traits which are not inherited over generations do not cause evolution.

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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?

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