The brown-eyed right-hander married the blue-eyed left-hander. They had two children: one blue-eyed right-hander

The brown-eyed right-hander married the blue-eyed left-hander. They had two children: one blue-eyed right-hander, the other blue-eyed left-hander. Determine the genotype of the mother.

If a blue-eyed left-hander was born in a couple, while this phenotype was not externally manifested in the mother, the genes for blue eyes and the predominant use of the left hand should be recessive.

Let’s designate the gene for blue eyes – a, brown eyes – A. The gene responsible for the use of the left hand – b, right hand – B. The genotype of the mother will be AaBb.

Father’s genotype: aabb. The blue-eyed lefty child is also aabb. As for the genotype of the blue-eyed right-hander – aaBb.