You test cross an F1 fish (with genotype BbCc) and obtain 1000 offsprings in F2 generation with the following results: 474 Bbcc, 480 bbCc, 20 BbCc and 26 bbcc. 1. Create and fill in a Punnet square for this cross. 2. What type of cross is it? 3. Are these loci linked?

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Chapter11: The Basic Principles Of Heredity
Section: Chapter Questions
Problem 11TYU: Individuals of genotype AaBb were mated to individuals of genotype aabb. One thousand offspring were...
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b) You test cross an F1 fish (with genotype BbCc) and obtain 1000 offsprings in F2 generation with the following results: 474 Bbcc, 480 bbCc, 20 BbCc and 26 bbcc.
1. Create and fill in a Punnet square for this cross.
2. What type of cross is it?
3. Are these loci linked?
4. What are the two parental classes and the two recombinant classes of offspring?
5. What is the percentage of recombination between these two loci? Show your calculations.
6. How many map units apart are they?

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