How often an allele occurs in the gene pool is

How often an allele occurs in the gene pool is allele frequency. Allele frequency defines how common an allele is in a population. It can be calculated by counting how many times the allele appears in the population and then dividing by the total number of copies of the gene.

An autotrophic protist - they can perform photosynthesis and mainly consist of unicellular algae. they can be divided into number of systematic group according to the shape of their cell and the type of photosynthetic pigments they use.