In: Biology
The data table below represents offspring generated through a 3 point mapping cross in Drosophila. Use the table to answer the 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 and second genes (region I)?
e. What is the map distance (centimorgans) between the second and third genes (region II)?
f. What is the coefficient of coincidence (C) and degree of interference (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 |