In mice, the ability to run in a straight line is a dominant trait. Mice with this trait are called running mice (R). The recessive trait causes mice to run in circles (r) and these are called waltzing mice. In mice, black hair (B) is dominant over brown hair (b). What is the probable phenotypic ratio of the offspring for a cross between two mice that are heterozygous for both traits

you would have a running mice with black hair

Explanation:

the phenotype is the physical trait and heterozygous means different which also means that you would have a Rr or Bb. the bigger letters are dominate so they overrule the recessive trait.

the oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 100 meters (328 feet), seaward from the coast to the open ocean.

explanation:

which