A corn breeder has a plant that is dominant for 4 traits thatare known to assort independently (i.e. it’s phenotype isA_ B_ C_ D_). This plant has desirable properties, so the breederwishes to determine its exact genotype. The breeder performs a testcross and obtains the following results in the F1 generation.
| Phenotype | Observed # | Phenotype | Observed # |
|---|
| A_ B_ C_ D_ | 61 | A_ bb cc D_ | 0 | | aa B_C_D_ | 79 | A_ bb C_ dd | 0 | | A_bb C_D_ | 0 | A_ B_ cc dd | 73 | | A_ B_ cc D_ | 59 | aa bb cc D_ | 0 | | A_ B_ C_ dd | 76 | aa bb C_ dd | 0 | | aa bb C_ D_ | 0 | aa B_ cc dd | 81 | | aa B_ cc D_ | 97 | A_ bb cc dd | 0 | | aa B_ C_ dd | 74 | aa bb cc dd | 0 |
| |
Based on these results, the breeder is confident that they knowthe original plant’s genotype. Make a hypothesis about thegenotype, and test it with a χ2 test. Show this test on a separatepage. | |
