Question

what is a phenotype? the written expression of two alleles a different version of a gene an actual physical trait resulting from alleles a specific characteristic of a living thing

Explanation:

• Option 1: The written expression of two alleles is the genotype (e.g., \(Aa\)), not the phenotype.
• Option 2: A different version of a gene is an allele.
• Option 3: The phenotype is the actual physical trait resulting from alleles. For example, if \(A\) is the allele for brown eyes and \(a\) for blue eyes, and the genotype is \(Aa\), the phenotype is brown eyes (assuming \(A\) is dominant).
• Option 4: A specific characteristic of a living thing is too broad. The phenotype specifically refers to the trait resulting from genetic makeup (alleles).

Answer:

An actual physical trait resulting from alleles.