Final answer:
The correct response is that the wildtype allele is the most common, LOF stands for Loss-of-function, and GOF stands for Gain-of-function.
Step-by-step explanation:
In mutations, the wildtype allele refers to the most common phenotype or genotype found in a natural population, which functions at a capacity sufficient to sustain life. It is considered the standard against which mutations are compared. Alleles revolve around variations from this wildtype, resulting in either loss-of-function (LOF) mutations that reduce or eliminate the function of the gene product, or gain-of-function (GOF) mutations that increase the function or cause it to appear in new times and/or places, potentially resulting in a dominant negative effect if the mutation interacts adversely with the wild-type gene product.