How to practice concept:gene-mutation

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Question 48

Open question
XL-RMCQ2 marksNeeds review
Two independent non-segregating recessive mutants (m1 and m2) display similar defects in petal formation. When they were crossed with each other (m1 × m2), all the F1 plants developed normal petals. In view of this observation, which of the following conclusions is CORRECT?
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