The observable traits of an organism are referred to as its:

• A. Genotype
• B. Phenotype
• C. Allele
• D. Chromosome

Answer: (B)

Phenotype is what you can observe or measure about an organism—the outward expression of its genes, often shaped by the environment. This includes traits like eye color, height, or flower color. The genotype is the genetic makeup that carries the information for those traits, not what you directly see. An allele is a variant form of a gene, and a chromosome is a structure that contains many genes and their DNA. Because the question focuses on observable traits, the term phenotype best describes what’s being asked.