Final answer:
The otters exhibiting brown and white combination with a new phenotype of tan demonstrate incomplete dominance. The green trait being hidden by the yellow trait represents recessive inheritance.
Step-by-step explanation:
In the case of otters that are brown and white combining to produce a new phenotype of a tan otter, the type of dominance being exhibited is incomplete dominance. In incomplete dominance, the heterozygous genotype results in a phenotype that is a blend or intermediate between the two homozygous genotypes. So in this case, neither the brown nor the white allele is dominant over the other, and the blend of the two colors produces the tan phenotype.
Regarding the green trait that is hidden by the yellow trait, this is an example of recessive inheritance. In this case, the green trait is masked or suppressed by the presence of the yellow trait, so it is not expressed in the phenotype unless the individual has two copies of the green allele.
Learn more about Mendelian Genetics & Dihybrid Crosses