Which term refers to the observable traits of an organism that are dictated by its genotype?

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

Answer: (C)

Verified step by step guidance

1. Understand the key terms: A 'genotype' refers to the genetic makeup of an organism, specifically the alleles it carries. An 'allele' is a variant form of a gene. A 'karyotype' is the complete set of chromosomes in a cell, often visualized to study chromosomal abnormalities. A 'phenotype' refers to the observable traits or characteristics of an organism, which result from the interaction of its genotype with the environment.
2. Recognize that the question is asking about observable traits. Observable traits include physical characteristics like eye color, height, or flower color in plants, as well as biochemical or physiological traits.
3. Recall that the observable traits (phenotype) are influenced by the organism's genotype (genetic makeup) and environmental factors. For example, a plant's height may depend on its genes but also on the availability of nutrients and sunlight.
4. Eliminate incorrect options: 'Genotype' refers to the genetic code, not the observable traits. 'Allele' is a specific version of a gene, not the traits themselves. 'Karyotype' refers to the chromosomal arrangement, not the traits.
5. Conclude that the correct term for observable traits dictated by the genotype is 'Phenotype'.