| Genotype | Phenotype |
| 1. Genotype is the genetic make up of organism, which determines the characters. | 1. Phenotype is the appearance of characters of an individual, produced as a result of interaction between gene and environment. |
| 2. Genotype can be ascertained from the ancestory of progeny of the individuals | 2. Phenotype can be read out from the individuals by direct observation |
| 3. Genotypically F2 Mendelian ratio is represented by 1: 2: 1 | 3. Phenotypically F2 Mendelian ratio is represented by 3:1 |
| 4. Individuals having identical genotype usually have the same phenotype provided they are present in the same environment | 4. Individuals having identical phenotype may or may not have the same genotype |