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   1 - AaBbCc
X

   1 - aabbcc
aa - pink coat (AA or Aa = brown coat)
bb - tailless (BB or Bb = tail)
cc - spotted (CC or Cc = unspotted)

Enter number of offspring observed from test cross:

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New problem
(3 different genes)

   1 - AaBbCc
X

   1 - aabbcc
aa - pink coat (AA or Aa = brown coat)
bb - tailless (BB or Bb = tail)
cc - spotted (CC or Cc = unspotted)

Gametes observed from Heterozygote (Total: 1000)


Info - Test Cross Linkage

Problem Solver

(calculator)

Accepts genotype (or phenotype) counts for three genes from a "test cross", and uses the counts to infer:

  • The gametic phase (heterozygote parent)
  • The recombination rate between the three genes
  • The gene order
  • Linkage

Test Yourself

(problem generator)

Presents genotype (or phenotype) counts observed for three genes from a "test cross". Use these results to propose:

  • The gametic phase (heterozygote parent)
  • The recombination rate between the three genes
  • The gene order
  • Linkage