We use the proportion of individuals with the recessive phenotype to calculate the frequency of the recessive allele (q). Why can't we calculate the frequency of the dominant allele in the same way, that is by using the proportion of the individuals with the dominant phenotype?

C) reflection (i also looked up the other choices just to make sure)

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.