The correct option is
B Crossing the F
1 hybrid with a double recessive genotype
- The test cross involves the crossing of F1 hybrid with a double recessive genotypic parent.
- By test cross, the heterozygocity and homozygocity of the organism can be tested.
- Thus, the offspring will be 100% dominant, if the individual which crossed with recessive parent i.e., (tt) was homozygous dominant and ratio will be 50% dominant and 50% recessive so that proves individual was heterozygous dominant. so , answer is option C .
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