Which statement is true about genotype and phenotype?

Which statement is true about genotype and phenotype?

• A. Genotype is the genetic makeup; phenotype is the observable traits resulting from gene expression and environment.
• B. Genotype is the observable traits; phenotype is the DNA sequence.
• C. Phenotype is the genetic makeup; genotype is visible traits.
• D. Genotype and phenotype are identical concepts.

Answer: (A)

Genotype refers to the genetic makeup—the specific alleles an organism carries in its DNA. Phenotype is what you can observe—the physical and physiological traits that result from those genes being expressed, and often influenced by environmental factors. This distinction explains why the statement is true: the genotype is the genetic code, while the phenotype is the observable outcome of how that code is expressed in the body, shaped by the environment. For example, a plant may carry alleles for color, but the actual flower color you see can depend on environmental conditions like light and soil nutrients. The other options mix up the meanings (phenotype isn’t the DNA sequence, genotype isn’t visible traits, and they aren’t identical), which is why they aren’t correct.

Genotype refers to the genetic makeup—the specific alleles an organism carries in its DNA. Phenotype is what you can observe—the physical and physiological traits that result from those genes being expressed, and often influenced by environmental factors. This distinction explains why the statement is true: the genotype is the genetic code, while the phenotype is the observable outcome of how that code is expressed in the body, shaped by the environment. For example, a plant may carry alleles for color, but the actual flower color you see can depend on environmental conditions like light and soil nutrients. The other options mix up the meanings (phenotype isn’t the DNA sequence, genotype isn’t visible traits, and they aren’t identical), which is why they aren’t correct.