It is known that brown eye color (A) and positive Rh factor (B) are inherited as unlinked

It is known that brown eye color (A) and positive Rh factor (B) are inherited as unlinked autosomal dominant traits. The brown-eyed Rh-positive parents had a blue-eyed Rh-negative baby. Make up solutions to the problem. Determine the genotypes of the parents, the child born and the possible genotypes and the ratio of the phenotypes of children in this family.

M – brown
m – blue
T – rhesus +
t – rhesus –
R: wives. MmTt * husband. Mmtt
gametes: MT MT MT MT; MT MT MT MT
F1: MMTT; MMTt; MMTT; MmTt;
MMTt; MMtt; MmTt; Mmtt;
MMTT; MmTt; mmTT; mmTt;
MmTt; MmTt; mmTt; mmtt
The genotypes of the parents will be heterozygous for both traits: MMTt – brown-eyed with Rh +.
The genotype of the child is mmtt – blue-eyed rhesus -.
In the first generation, 9 genotypes are distinguished and the ratio of phenotypes is 9: 3: 3: 1.