When crossing white rabbits with shaggy hair and black rabbits with smooth hair, offspring was obtained

When crossing white rabbits with shaggy hair and black rabbits with smooth hair, offspring was obtained: 50% black hairy and 50% black smooth. When crossing other pairs of white rabbits with furry hair and black rabbits with smooth hair, 50% of the offspring turned out to be black furry and 50% – white furry. Make a diagram of each cross. Identify the genotypes of parents and offspring. Explain what the law is in this case.

The scheme for solving the problem includes:
1) 1 crossing:
P rabbits: white furry aaBb x black smooth AAbb
G AB, AB AB
F1 50% black hairy Aabb, 50% black smooth Aabb;
2) 2 crossing:
P rabbits: white furry aaBB x black smooth Aabb
G AB AB, AB
F1 50% black hairy AaBb, 50% white hairy AaBb;
3) the law of independent inheritance of characters appears