A quarter of children born to two brown-eyed parents who have both brown and blue-eye genes among their ancestors will have blue eyes. The rest will be brown.
A quarter of children born to two brown-eyed parents who have both brown and blue-eye genes among their ancestors will have blue eyes. The rest will be brown.
如果夫妻俩都是褐色眼睛，但双方的祖辈中既有褐色眼睛也有蓝色眼睛，那他们生蓝眼睛孩子的几率为四分之一，生褐色眼睛孩子的几率为四分之三。