This same geneticist carries out a series of
two-point crosses among fruit flies between genes for brown eyes
(bw), arc wings (a), vestigial wings (vg), ebony body color
(e), and curved wings (cv). The following number of
nonrecombinant (non RC) and recombinant (RC) progeny were obtained
from each cross.
Genes in cross
Progeny (Non RC)
Progeny (RC)
Total Progeny from cross
a, bw
2224
117
2341
a, cv
2609
823
3432
a, e
3200
3200
6400
a, vg
5172
2379
7551
bw, cv
4614
1706
6320
bw, e
4150
4150
8300
bw, vg
2796
1434
4230
cv, e
3116
3116
6232
cv, vg
2102
305
2407
vg, e
4559
4559
9118
Using these data from two-point crosses, create a genetic map
for these genes, providing the order of the genes and estimates of
the distances separating them.