The polled (hornless) condition (P) is dominant over horned (p). A certain polled bull is crossed to 3 cows.
1. With cow A, which is horned, a polled cow is produced;
2. With cow B, also horned, a horned cow is produced;
3. with cow C, with is polled, horned cow is produced.
What are the genotypes of the three calves and the four parents?