在人的生活中,命运常常取决于一个人的家庭出身。一项新的研究发现:父辈相貌丑陋的幼雀不仅丧失了继承优良基因的先机,而且鸟爸爸带回家的食物分到的也甚少。因此鸟妈妈就想出了一个聪明的对策,来弥补由此而引起的营养不足。雄性家雀的颜色包括从鲜红色到褐黄色等多种色彩。羽毛颜色是由类胡萝卜素类食物 In human life, the fate often depends on a person’s family origin. A new study finds that the juvenile fragile siblings not only lost the opportunity to inherit good genes, but also had little food for birds and dads to bring home. Therefore, the bird mother came up with a clever countermeasure to compensate for the nutritional deficiencies caused thereby. The colors of the male bird finch include various colors from bright red to brown yellow. Feather color is made from carotenoids