What evidence do fossils provide about the ancestors of whales

Fossils provide lots of evidence about the ancestors of whales. For example it shows that a land mammal lived between 50 million and 70 million years ago. Scientists think whales evolved from these ocean-dwelling mammals. They can tell this and more cell from a fossil.

Explanation:

the genotypes would be 50% bb and 50% bb

the phenotypes would be 50% brown and 50% white. hope this : )