cluster of gene造句

Mhc is an extended cluster of genes with extraordinary polymorphism , which consists of three classes of genes ( class i , class ii and classiii ) . they are different from each other in their structure , expression , mode of evolution and so on . class ii genes are further divided into two subclasses and the mhc genes spread over nearly all vertebrates extensively
Mhc基因是一个高度多态的基因群，主要包括三大类基因?类( class ) 、类( class )和类( class )基因，它们无论在结构组成、表达组织的类型、刺激特定t细胞的类群及长期进化等方面都有所不同；类基因还可进一步分为a 、 b两个亚类：各类基因广泛分布于各种脊椎动物体内。
It's difficult to find cluster of gene in a sentence. 用cluster of gene造句挺难的