Genetic Inheritance and Phenotype Determination

Genetic inheritance plays a crucial role in determining the physical characteristics, or phenotypes, of an individual. In this case, if allele A represents brown eyes and allele a represents blue eyes, the phenotype of an individual with the genotype Aa would be brown eyes.

When it comes to genetic inheritance, dominant alleles will overshadow or restrict the expression of traits associated with recessive alleles. In the case of Aa genotype, the dominant allele A will determine the phenotype, which in this instance is brown eyes.

This means that even though the individual carries one dominant allele (A) and one recessive allele (a), the dominant trait will be expressed in the phenotype. It is important to remember that dominant alleles take precedence over recessive alleles in determining the physical characteristics of an individual.

In conclusion, the genotype Aa would result in the phenotype of brown eyes due to the dominance of the allele representing brown eyes over the allele representing blue eyes.