麻烦帮忙分析下这个句子的语法结构

Question

They plan to activate a gene in the mouse that will selectively eliminate senescent cells
这句话中they 是主语，plan是谓语，to activate 是动词不定式做宾语，那后面a gene是做什么成分？that后面引导的从句是状语从句还是修饰gene的定语从句呢？请问这两者该如何区分？谢谢！

Answer 1

主从复合句：
主句主语：They
谓语动词：plan
宾语由动词不定式充当：to activate a gene in the mouse；
that 引导的是一个定语从句，修饰的是宾语中心词gene，即that will selectively eliminate senescent cells。

Answer 2

They plan to activate a gene in the mouse that will selectively eliminate senescent cells 这句话中they 是主语，plan是谓语，to activate 是动词不定式做宾语，那后面a gene是做不定式的宾语。that后面引导的从句是修饰gene的定语从句。