1- Mendel came to the conclusion that the inheritance of every trait is determined by units (now called genes) that are passed on to the offspring and remain unchanged.
2-That when two alleles of a pair are heterozygous, the dominant allele will be expressed while the recessive one will not.
GLD-1 is a regulatory protein whose function is to regulate the expression of MES-3.
Explanation:
Since the MES-3 protein itself is not modified but only its quantity is, then it is likely that the GLD-1 protein is only inhibiting MES-3's expression; keeping it at a certain level set by the organisms DNA.