It is likely that telocentric chromosomes with minute sizes may be ancestral types of the vertebrate chromosomes . 2 从文昌鱼染色体的核型看，似乎形态较小的端部着丝粒染色体是脊椎动物染色体的远祖。
2.
Telocentric lenses work with a wide depth of field . with a telocentric lens , you can image objects of different distances from the lens and the objects stay in focus 具端着丝粒的镜头(注:我猜是类似于针孔镜头吧)具有宽阔之景深，以具端着丝粒的镜头，你能够将由镜头不同距离之目标物成像和保持目标物在焦。
3.
In this paper , the genetic diversity of qinghai - lake naked carps was studied for the first time by methods of chromosome karyotype , protein ( isomzy ) electrophoresis and mtdna rflp . the results of chromosome karyotype indicated that : ? the diploid chromosome number of qinghai - lake nakked carp was 2n = 92 that comprised of 18 metacentric chromosomes , 18 submetacentric chromosomes , 16 telocentric chromosomes and 40 acrocentric chromosomes , and the karyotype formula was 18nvh8snvh6st + 40t , nf = 128 染色体核型研究结果表明；青海湖裸鲤染色体总数2n = 92条，由18条中着丝粒染色体、 18条近中着丝粒染色体、 16条近端着丝粒染色体和40条端着丝粒染色体组成，其核型式为： 18m + 18sm + 16st + 40t ， nf = 128 。
4.
This showed that the diploid chromosome number ( 2n ) of amphioxus b . belcheri tsingtauense was 36 . the chromosomes were extremely small , ranging from 1 . 4 to 3 . 7 um in length . the first pair of the 36 chromosomes of b . belcheri tsingtauense was subtelocentric and the other 17 pairs telocentric . neither metacentric nor submetacentric chromosomes nor satellites were observed 在36条染色体中，除第一对染色体属亚端部着丝粒染色体( st )外，其余均为端部着丝粒染色体( t ) ，未见中部着丝粒染色体( m )和亚中部着丝粒染色体( sm )及随体。
