Principles of Inheritance and Variation Question 36

36. Test cross in plants or in Drosophila involves crossing

[2011M]

(a) between two genotypes with recessive trait

(b) between two $F_1$ hybrids

(c) the $F_1$ hybrid with a double recessive genotype.

(d) between two genotypes with dominant trait

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Answer : c

Hints & Solution

(c) In test cross, genotype of an organism showing dominant phenotype is determined by crossing it with homozygous recessive genotype.