In a series of two-point mapping crosses involving five genes located on chromosome II in Drosophila, the following recombinant (single-crossover) frequencies were observed:
pr–adp | 29% |
pr-vg | 13 |
pr–c | 21 |
pr–b | 6 |
adp–b | 35 |
adp–c | 8 |
adp–vg | 16 |
vg–b | 19 |
vg–c | 8 |
c–b | 27 |
(a) Given that the adp gene is near the end of chromosome II (locus 83), construct a map of these genes.
(b) In another set of experiments, a sixth gene, d, was tested against b and pr:
d–b | 17% |
d–pr | 23% |
Predict the results of two-point mapping between d and c, d and vg, and d and adp.
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