染色体作为主要的遗传物质DNA载体，研究它的结构和功能是细胞遗传学必不可少的重要环节。
It is an important process of cytogenetics to study the structures and functions of chromosome, the main carrier of genetic material DNA.
DNA是生物体主要的遗传物质，有关DNA的研究是揭示生物遗传奥秘的基础。
DNA is the main hereditary substance of biological object. The study on DNA is the basis of exposing biological heredity secrets.
DNA是生物体主要的遗传物质，有关DNA的研究是揭示生物遗传奥秘的基础。
DNA is the main hereditary substance of biological object. The study on DNA is the basis of exposing biological heredity secrets.
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