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The data table below represents offspring generated through a 3 point mapping cross in Drosophila. Use...

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Biology

The data table below represents offspring generated through a 3point mapping cross in Drosophila. Use the table to answerthe following questions:

a. What was the parental cross (parental genotypes)?

b. Fill in which phenotype represents the different classes(NCO, DCO, SCOs).

c. What is the relative order of the genes?

d. What is the map distance (centimorgans) between the first andsecond genes (region I)?

e. What is the map distance (centimorgans) between the secondand third genes (region II)?

f. What is the coefficient of coincidence (C) and degree ofinterference (I)? What do these values mean?

Phenotype

Number

Class

+, +, +

39

pr, bl, vg

39

+, +, vg

257

pr, bl, +

249

+, bl, vg

4175

pr, +, +

4102

+, bl, +

518

pr, +, vg

520

Total

9899

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