chromosome end染色体端chromosomen.染色体chromosome integration染色体整合chromosome condensation染色体收缩,染色体凝缩chromosome substitution染色体代换chromosomes abnormality染色体异常chromosome fragile site染色体脆弱位点chromosome microcloning染色体微克隆chromosome degeneration染色体退化chromosome partitioning染色体分配chromosome localization染色体定位chromosome flow sorting染色体流式分选