explain industrial melanism and genetic repattering during isolation with example.
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The industrial melanism is dark-colored varieties of animals (especially moths) in industrial areas where they can be better camouflaged against predators. and genetic repatterning during isolation is a population of organisms that has little or no mixing with other organisms within the same species.
The natural colour patterns of animals are adaptations produced by natural selection.
A change in frequency (percentage) of genetically determined phenotypes in natural populations is direct evidence of evolutionary change.
Mutations introduce new genetic variation to a population, but recurrent mutations occur too rarely to bring about rapid changes in the frequency of genes.
Random changes in the frequency of genes (genetic drift) are irregular and unpredictable in direction.
Directional, rapid changes in the frequency of genetically determined phenotypes in populations result from natural selection.
Historical records on phenotypic frequencies from population samples allow the assessment of natural selection.
Gene flow (migration) retards genetic differentiation among geographically widespread populations.
Clines indicate different selection pressures along environmental gradients; when selection is removed, migration homogenises the differences along a cline.
Parallel evolution is ‘nature's replicate experiment’.
The natural colour patterns of animals are adaptations produced by natural selection.
A change in frequency (percentage) of genetically determined phenotypes in natural populations is direct evidence of evolutionary change.
Mutations introduce new genetic variation to a population, but recurrent mutations occur too rarely to bring about rapid changes in the frequency of genes.
Random changes in the frequency of genes (genetic drift) are irregular and unpredictable in direction.
Directional, rapid changes in the frequency of genetically determined phenotypes in populations result from natural selection.
Historical records on phenotypic frequencies from population samples allow the assessment of natural selection.
Gene flow (migration) retards genetic differentiation among geographically widespread populations.
Clines indicate different selection pressures along environmental gradients; when selection is removed, migration homogenises the differences along a cline.
Parallel evolution is ‘nature's replicate experiment’.
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