Integrated Principles of Zoology 14th Edition by Cleveland Hickman, Larry Roberts, Susan Keen, Allan Larson

Exercise 11

Assume right-handedness ( R ) is genetically dominant over left-handedness ( r ) in humans, and that brown eyes ( B ) are genetically dominant over blue ( b ). A right-handed, blue-eyed man marries a right-handed, brown-eyed woman. Their two children are (1) right handed, blue eyed and (2) 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 probable genotypes of the man and his two wives?