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NEET 2012
Exam
NEET
Year
2012
Subject
Zoology
Chapter
Principles of Inheritance and Variation

NEET 2012 · Zoology · Principles of Inheritance and Variation

A test cross is carried out to

A test cross is carried out to

Options

  1. Adetermine the genotype of a plant at F2\mathrm{F}_2
  2. Bpredict whether two traits are linked
  3. Cassess the number of alleles of a gene
  4. Ddetermine whether two species or varieties will breed successfully

Correct answer

A. determine the genotype of a plant at F2\mathrm{F}_2

Step-by-step solution

When F1\mathrm{F}_1 hybrid is crossed with its recessive parent, it is called test cross. By test cross heterozygosity and homozygosity of the organism can be tested. It gives 1:11: 1 ratio in monohybrid and 1:1:1:11: 1: 1: 1 ratio in dihybrid condition. In presence of linkage the ratio varies from this.
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