NEETBiologyPrinciples of Inheritance and VariationMCQ+4 / −1
A test cross is carried out to :
- ADetermine whether two species or varieties will breed successfully
- BDetermine the genotype of a plant at F2
- CPredict whether two traits are linked
- DAssess the number of alleles of a gene
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Correct answer: B
Test cross is performed to determine the genotype of F2 plant. In a typical test cross an organism showing dominant phenotype and whose genotype is to be determined is crossed with one that is homozygous recessive for the allele being investigated, instead of self-crossing. The progenies of such a cross can easily be analysed to predict the genotype of the test organism.
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