A) between two F1 hybrids
B) between two genotypes with recessive trait
C) between two genotypes with dominant trait
D) the F1 hybrid with a double recessive genotype
Answer: D) the F1 hybrid with a double recessive genotype
Explanation: Test cross involves crossing a plant showing dominant trait with the homozygous recessive genotype. The genotype of F1 hybrids showing dominant characteristics can be determined by the test cross.
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