One plant with water the other with vinigaer what is the aim of investigation

The model illustrates a process by which a substance is taken up by a cell

Amouse that is homozygous for the dominant trait has the genotype . it has . a mouse that is homozygous for the recessive trait has the genotype . it has . image of fur color of mice

If the frequency of the p allele is .63 in the population then what is the frequency of the q allele?