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Q.

In testcross :

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a

 The organism expressing the dominant phenotype but having an unknown genotype is crossed with a known homozygous recessive individual.

b

 The organism expressing the recessive phenotype is crossed with a known homozygous dominant individual.

c

 The organism expressing the recessive phenotype is crossed with a known heterozygous dominant individual.

d

 The organism expressing the dominant phenotype but having an unknown genotype is crossed with a known heterozygous dominant individual.

answer is A.

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Detailed Solution

In testcross, the organism expressing the dominant phenotype but having an unknown genotype is crossed with a known homozygous recessive individual.

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