Result From Specific Alleles Carried By An Individual. Each variation of a gene is called an allele pronounced AL-eel. On the other hand the phenotype is the expression of the genes.
Interaction of genes with. Deleterious recessive alleles may persist in a population at low frequencies with most copies carried in heterozygotes at no cost to those individuals. Alleles can sometimes result in different phenotypes observable traits with certain alleles being dominant overriding the traits of other alleles or in some cases multiple alleles acting in a codominant fashion.
For a specific trait animal cells usually have two alleles.
Each pair of alleles represents the genotype of a specific individual and in this case there are 3 possible genotypes. This is important because it gives organisms to be incredibly varied in the functions of their various alleles while at the same time being able to reproduce. Each individual in a population of diploid organisms can only carry two alleles for a particular gene but more than two may be present in the individuals that make up the population. The principle that genes and their alleles are carried on the chromosomes.