Question

A corn breeder has a plant that is dominant for 4 traits that are known to assort independently (i.e. it’s phenotype is A_ B_ C_ D_). This plant has desirable properties, so the breeder wishes to determine its exact genotype. The breeder performs a test cross 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 know the original plant’s genotype. Make a hypothesis about the genotype, and test it with a χ2 test. Show this test on a separate page.

Answer 1