[A]: If a population is of dominant genotype AA, then the frequency of dominant alleles in the gene pool will be relatively higher.
[R]: The percentage of gametes bearing recessive (aa) allele will be correspondingly low

Options

A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false

Answer

To solve the question, we need to analyze the two statements provided and determine their validity as well as the relationship between them.

### Step-by-Step Solution:

1. **Understanding Statement A**:
- Statement A claims that if a population has a dominant genotype (AA), then the frequency of dominant alleles (A) in the gene pool will be relatively higher.
- Since the genotype is AA, it means that both alleles present are dominant. Therefore, the frequency of the dominant allele A will indeed be higher because there are no recessive alleles present.

2. **Understanding Statement R**:
- Statement R states that the percentage of gametes bearing the recessive allele (aa) will be correspondingly low.
- In a population with the genotype AA, there are no recessive alleles (a) present. Consequently, the percentage of gametes that carry the recessive allele will be low (in fact, it will be zero).

3. **Evaluating the Truth of Both Statements**:
- Both statements A and R are true. Statement A is true because the frequency of the dominant allele A is indeed higher in a population of genotype AA. Statement R is also true because there are no recessive alleles present in this population, leading to a low percentage of gametes bearing the recessive allele.

4. **Determining the Relationship Between A and R**:
- We need to check if R correctly explains A. Since the absence of recessive alleles (as stated in R) logically supports the assertion that the frequency of dominant alleles is high (as stated in A), R does indeed provide a correct explanation for A.

5. **Conclusion**:
- Therefore, both statements A and R are true, and R is the correct explanation of A.

### Final Answer:
Both statements A and R are true, and R is the correct explanation of A.

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