Which statement is true?(1 point)
Responses
Neutral mutations occur when a mutation in a DNA region results in the same sequence as the original.
Neutral mutations occur when a mutation in a DNA region provides an advantage that helps the organism survive.
Neutral mutations occur when a mutation is found in a DNA region that codes for proteins.
Neutral mutations occur when a mutation is found in a DNA region and results in a harmful disease.
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well, what does "neutral" mean?
To determine which statement is true, we need to understand the concept of neutral mutations.
Neutral mutations are mutations that do not significantly affect the survival or reproduction of an organism. They occur in DNA regions that do not code for important functional elements, such as proteins.
Let's examine each statement:
1. "Neutral mutations occur when a mutation in a DNA region results in the same sequence as the original."
This statement is true. When a mutation occurs in a non-coding region of DNA and does not change the sequence, it is considered a neutral mutation since it has no effect on the organism.
2. "Neutral mutations occur when a mutation in a DNA region provides an advantage that helps the organism survive."
This statement is not true. Neutral mutations are defined by their lack of impact on an organism's survival or reproductive success. Mutations that provide advantages are called beneficial mutations.
3. "Neutral mutations occur when a mutation is found in a DNA region that codes for proteins."
This statement is not entirely accurate. Neutral mutations typically occur in non-coding regions of DNA, as they are less likely to have an effect on an organism's function. However, mutations in protein-coding regions can also be neutral if they do not alter the amino acid sequence or protein function.
4. "Neutral mutations occur when a mutation is found in a DNA region and results in a harmful disease."
This statement is not true. Neutral mutations do not cause harmful diseases or have negative consequences for an organism's health. They are defined by their lack of significant impact.
Therefore, the correct statement is: "Neutral mutations occur when a mutation in a DNA region results in the same sequence as the original."