Question

which includes the physical characteristics of an organism?
○ gene
○ allele
○ genotype
○ phenotype

Explanation:

To solve this, we analyze each term:

• Gene: A segment of DNA coding for a trait, not physical characteristics.
• Allele: Variant form of a gene, not physical characteristics.
• Genotype: Genetic makeup of an organism, not physical characteristics.
• Phenotype: Observable physical (and physiological) traits of an organism, matching the question.

Answer:

D. phenotype