C) <em>The frequency of heterozygotes is given by (p + q)/N, where N is the number of individuals in the population.</em>
Answer:
If the parents were both carriers.
Explanation:
Since cystic fibrosis is a recessive genetic disorder, two of the same alleles must be present in order to show, so.. for example, the genotype would be cc. The parents without the disorder must've been carriers, and their genotype would be Cc.
If you do a punnet square, Cc x Cc = 25% cc, 50% Cc, and 25% CC.
Although this question is vague, I will answer it to the best of my ability.
Substances between these pH levels are slightly acidic and basic. Considering water's pH is 7, some items that have pH's between these specs are black coffee, urine, water, and seawater, in that order.