Is a gene that can be masked by dominant gene

i believe the answer is recessive.

Explanation:

a recessive gene can be expressed as rr instead of RR so if one does a punnet square it would show up to be Rr Rr Rr Rr, since R represents a dominant trait and r being being recessive, then the answer would be recessive. (sorry if it doesn't really make any sense)

An allele is the code in a gene that determines a specific trait. There are strings of alleles represented by letters that determine certain physical traits, like a code. A recessive allele is an allele that is masked by a dominant one. The only way for a recessive allele to be expressed is if there are two of the same recessive alleles that give a specific trait.