How long a dog flea survives depends on several factors. The average flea survives a few days to two weeks without a food supply, and they can live much longer with a host.
Genotype, the genetic constitution of an organism. The genotype determines the hereditary potentials and limitations of an individual from embryonic formation through adulthood. Among organisms that reproduce sexually, an individualâs genotype comprises the entire complex of genes inherited from both parents.
Genotype-phenotype distinction. From Wikipedia, the free encyclopedia. The genotypeâphenotype distinction is drawn in genetics.  Genotype  is an organism's full hereditary information.  Phenotype  is an organism's actual observed properties, such as morphology, development, or behavior.This distinction is fundamental in the study of inheritance of traits and their evolution.n organism's genotype is a major (the largest by far for morphology) influencing factor in the development of its phenotype, but it is not the only one. Even two organisms with identical genotypes normally differ in their phenotypes. One experiences this in everyday life with monozygous (i.e. identical) twins.