polycentromere

例句：

1. 1.The polytene chromosomes are visible under a microscope.
   在显微镜下可以看到多着丝点染色体。
2. 2.Polytene chromosomes are found in many species of fungi.
   许多种真菌都有多着丝点染色体。
3. 3.In some species, the polytene chromosomes can be used as markers for genetic diversity.
   在某些物种中，多着丝点染色体可以作为遗传多样性的标记。