Questions: If the frequency of an allele reaches 1.0 , the allele is said to be Multiple Choice lost. stable. perfect. fixed.

If the frequency of an allele reaches 1.0 , the allele is said to be Multiple Choice lost. stable. perfect. fixed.
Transcript text: If the frequency of an allele reaches 1.0 , the allele is said to be Multiple Choice lost. stable. perfect. fixed.
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Solution

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The answer is the fourth one (D): fixed.

Explanation for each option:

  • Lost: This term refers to an allele that has been completely removed from the population, meaning its frequency is 0.0, not 1.0. Therefore, this option is incorrect.

  • Stable: While an allele with a frequency of 1.0 might be considered stable in the sense that it is not changing, the term "stable" is not the correct term used in population genetics to describe an allele with a frequency of 1.0. Thus, this option is incorrect.

  • Perfect: This term is not used in population genetics to describe allele frequencies. It does not accurately describe an allele with a frequency of 1.0. Therefore, this option is incorrect.

  • Fixed: In population genetics, when an allele reaches a frequency of 1.0, it is said to be "fixed" in the population. This means that every individual in the population carries this allele, and there is no genetic variation at this locus. Therefore, this option is correct.

In summary, when the frequency of an allele reaches 1.0, the allele is said to be fixed.

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