2. Why a fertilized egg can develop into dififerent cells: Gene differentiated express 分子杂交技术检测基因及其表达 细总NA 细胞总RA 输哋燧胞胰哿输燧r胞胰 骗因++++ B瑞蛋因+ 胰因 实法去 Sth交 Northem交2. Why a fertilized egg can develop into different cells: Gene differentiated express 分子杂交技术检测基因及其表达