Question

1- In a species of mice, brown fur color is dominant to white fur color. When a brown mouse is crossed with a white mouse all of their offspring have brown fur. Why did none of the offspring have white fur?

Answer 1

The offspring did not have white fur due to the fact that white fur is a recessive trait. One parent had brown fur, which is a dominant trait, that cancels out the recessive trait and that is why the offspring did not have white fur.