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Question 2 Genes a and b are linked, with 20% recombination frequency. Two pure breeding strains...

Question 2

Genes a and b are linked, with 20% recombination frequency. Two pure breeding strains (the parental cross) were crossed. The F1 was then testcrossed.

a+b-/a-b+ x a-b-/a-b-

  1. What were the parental strains genotypes?

b. What would be the genotypes and the probability of each, among progeny of the testcross? Example: a+b+/a-b- 45%

c. Is this an example of cis- or trans-linkage?

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