Answer:
Dominant, Recessive
Explanation:
During inheritance, there are different variants of a gene. They are called Alleles. An allele can be dominant , recessive or codominant. Dominant genes is the allele variant that gets expressed over the other.
Recessive is the allele whose traits have been masked by a dominant allele.
In our case, two mice were bred. However, out of the five offsprings four were brown and one white.
This shows that brown allele must be the dominant one whereas the white gene is recessive.