Answer:
A recessive autosomal allele is a heterozygous pair.
Explanation:
they have one mutated gene (recessive gene) and one normal gene (dominant gene) for the condition.
I would say you're best choice is E or F, but I can't remember right now. Its been a bit since my gene mutation module. Sorry I can't help more!
I believe it is the frequency, because when a oscillation occurs that is the starting point to determine when another wave is to come.
Because the mutation which does not have any effect on protein code I.e. even after the mutation if the gene still codes the same protein is called silent mutation