______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________一些。 近交的有害影响是什么？ (p.556) ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ 5. 什么是基因工程？ (p.557) ______________________________________________________________________________________ ______________________________________________________________________________________ 6. 什么是限制酶，它们在基因工程过程中有什么功能？ (p.558) ______________________________________________________________________________________ ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________一些。近交的有害影响是什么？(p.556) ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ 5.什么是基因工程？(p.557) ______________________________________________________________________________________ ______________________________________________________________________________________ 6.什么是限制酶，它们在基因工程过程中有什么功能？(p.558) ______________________________________________________________________________________ ______________________________________________________________________________________