Dihybrid cross question

Hi can someone pls help me understand this question , the correct answer is B

Q)The parents of a dihybrid cross:
A. are genetic opposites at the genes of interest.

B. are genetically identical at the genes of interest.

C. are genetic opposites at one gene and genetically identical at the other.

D. have no genetic relationship.


iā€™m assuming the question is referring to pure breeding in a test cross
Screenshot 2023-07-09 12.15.53 PM

if the parents are genetically identital in F1 then we can establish the pheno ratio of 9:3:3:1

The question is not clear at all though

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yes the question is not clear , thank you though!!