Which of the following is not true of an organism's genotype?

• A. It influences the phenotype of the organism.
• B. It can be directly observed in the organism's physical traits.
• C. It is the genetic makeup of an organism.
• D. It consists of alleles inherited from both parents.

Answer: (B)

Verified step by step guidance

1. Understand the definition of genotype: Genotype refers to the genetic makeup of an organism, including all the alleles inherited from both parents.
2. Recognize the relationship between genotype and phenotype: The genotype influences the phenotype, which is the observable physical or biochemical characteristics of an organism.
3. Identify the key distinction: While genotype influences phenotype, it cannot be directly observed in the organism's physical traits. Phenotype is the expression of the genotype, but the genotype itself is not visible.
4. Consider the inheritance aspect: Genotype consists of alleles inherited from both parents, which contribute to the organism's genetic makeup.
5. Evaluate the statements: Determine which statement incorrectly describes genotype by considering the definitions and relationships outlined in the previous steps.