This image shows the relative frequency of banded and non-banded snails in a population. If the frequency of banded snails decreased to 60% and non-banded snails increased to 40%, would you consider the population to be evolving?
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This image shows the relative frequency of banded and non-banded snails in a population. If the frequency of banded snails decreased to 60% and non-banded snails increased to 40%, would you consider the population to be evolving?
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No, the population is not evolving.
Explanation:
- Even if the frequency of banded snails decreased to 60% and non-banded snails increased to 40%, the population of snails is said to be not evolving because the image signifies a Single-Gene trait.
- In Single-Gene trait the phenotypic characters are controlled by one gene that has 2 alleles, therefore there can be only 2 distinct Phenotypes which are banded or non-banded.
- Evolution does not act on genes but on the phenotypic frequencies by changing the frequencies of alleles.
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