Genetics 【遗传】
with obj.
- cross (a hybrid) with one of its parents or an organism with the same genetic characteristics as one of the parents使（杂种）回交（或逆代杂交）：
as adj. backcrossed after five generations the backcrossed dogs were indistinguishable from pure-bred Dalmatians.五代之后这些逆代杂交狗就与纯种达尔马提亚狗没什么分别了。