Deviations from expected ratios in dihybrid crosses can be caused by random fertilization, especially in small sample sizes, or by gene linkage, where genes on the same chromosome are inherited together.
Unexpected phenotypic ratios in dihybrid crosses can occur due to random fertilization (skewing ratios in small samples) or the genes being linked on the same chromosome, meaning they are inherited together unless crossing over occurs.
| Front | Expected ratio of the 4 diff phenotypes (in dihybrid cross) can differ from actual as; |
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