chromosome end染色体端chromosomen.染色体chromosome mobilization染色体移动chromosome distribution染色体分布chromosome organization染色体组织chromosome compositions染色体构成chromosome recombination染色体重组Chromosome amplification缺失性改变chromosome nonhomologous异源染色体chromosome reduplication染色体加倍； 染色体复制chromosome translocation染色体易位chromosome cell division染色体细胞分裂