染色体数目Number of chromosomes | ≤42 | 43 | 44 | 45 | 46 | 47 | 48 | ≥49 |
分裂相数目Number of metaphase | 6 | 2 | 1 | 1 | 4 | 2 | 82 | 2 |
出现频率(%) Frequency (%) | 6 | 2 | 1 | 1 | 4 | 2 | 82 | 2 |