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Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation1 Mark
MCQ
A test cross is carried out to:
  • ✓
    Determine the genotype of a plant at $F2​.$
  • B
    Predict whether two traits are linked.
  • C
    Assess the number of alleles of a gene.
  • D
    Determine whether two species or varieties breed successfully.
✓

Answer

Correct option: A.
Determine the genotype of a plant at $F2​.$
Test cross is the crossing of an $F1$​ progeny with a homozygous recessive parental progeny is done in order to determine whether the progeny is homozygous or heterozygous for a character under consideration. This is called a test cross.
Those that are heterozygous will have one dominant and one recessive allele individuals and those that are homozygous dominant will have two dominant alleles, and those that are homozygous recessive will have two recessive alleles.

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