<span>50%
Since each parent contributes 1 allele to their offspring, we can expect a even distribution of 4 allele combinations in the offspring of these fish. They are
s1s2 = s1 from 1st parent, s2 from 2nd parent
s1s4 = s1 from 1st parent, s4 from 2nd parent
s3s2 = s3 from 1st parent, s2 from 2nd parent
s3s4 = s3 from 1st parent, s4 from 2nd parent
Since both the s1s4 and s3s2 offspring have 5 units of color, that would indicate that 50% of their offspring will have 5 units of color.</span>
A rock would have to be the answer since it's composed of a solid mixture of minerals
