From crossing a red cow with a black bull, all the offspring were red. The same bull was crossed with a red cow

From crossing a red cow with a black bull, all the offspring were red. The same bull was crossed with a red cow, but the crossing results are different: 50% red, 50% black. Make 2 crossing schemes, determine the genotypes of all animals.

AA-red cow
aa-black bull
R: AA (sign of the mirror of Venus) x aa (sign of the spear of Mars)
G: A A x a a
Aa Aa Aa Aa (the offspring is red)
Scheme 2
Aa red cow
aa-black bull
R: Aa (sign of the mirror of Venus) haa (sign of the spear of Mars)
G: A x a
Aa Aa aa aa (offspring have 50% black and red color)
Scheme 1 genotype 4
Scheme 2 genotype 2: 2