12. Assume right-handedness (R) dominates over left-handedness (r) in humans, and that brown eyes (B) are dominant over blue (b). A right-handed, blue-eyed man marries a right-handed, brown-eyed woman. One of their two children is right-handed/blue-eyed, while the other is left-handed/brown-eyed. The man marries again, and this time the woman is right-handed and brown-eyed. They have 10 children, all right-handed and brown-eyed. What are the genotypes of the husband and two wives?

Possible genotypes for the man: Possible genotypes for the first wife:





Now you should be able to eliminate some of those genotypes.

Genotype of the man? Genotype of the first wife?





Possible genotypes of the second wife:



Eliminate by examining the traits of the children.

Genotypes of the second wife?