AaBb × AaBb 且存在互补基因效应(香豌豆花色)时呈 9:7 比例:A_B_ = 9/16 有色,A_bb + aaB_ + aabb = 7/16 白色。160 个 F2 后代的期望值为 90 有色(56.25%)和 70 白色(43.75%)。{"result":"Complementary genes (9:7): 2 phenotypic classes from AaBb × AaBb. Expected in 160 F2: 90 colored (purple) / 70 white.","metadata":{"input":{"interactionType":"complementary","totalOffspring":160},"result":{"ratio":"9:7","totalRatioParts":16,"classes":[{"genotypes":"A_B_","ratioPart":9,"expectedCount":90}]}}}
孟德尔双因子数据(315:108:101:32)符合 9:3:3:1 孟德尔种子形状 × 颜色的 F2 计数(315 圆黄、108 皱黄、101 圆绿、32 皱绿,N = 556)对无互作 9:3:3:1 期望(312.75 : 104.25 : 104.25 : 34.75)检验:χ² = 0.47,df = 3(α = 0.05 临界值 7.815),偏差不显著——数据拟合良好。{"result":"No interaction (9:3:3:1): 4 phenotypic classes from AaBb × AaBb. Observed N=556, chi-square=0.47 (df=3, not significant at α=0.05).","metadata":{"input":{"interactionType":"independent","totalOffspring":556,"observedCounts":[315,108,101,32]},"result":{"ratio":"9:3:3:1","chiSquare":0.47,"significant":false}}}