AP Biology Problem sets for chromosomal mapping
For the following problems,
(A) Determine if the chromosomes are linked based on the ratio of progeny.
(B) Calculate the distance between genes in map units if they are linked.
(C) Determine the order in which the genes appear on the chromosome if they
are linked.
(D) Calculate the interference if there is one.
F2 generations are as follows:
1.
ABD
A b d
A B d
a b D
A b d
a B D
A b D
a B d
316
314
31
39
130
140
17
13
2.
A C E
a c e
A c e
a C E
A C e
a c E
a C e
A c E
243
237
62
58
155
165
46
34
3. The two problems above are showing five genes on the same chromosome.
Construct a possible map if C/E show independent assortment from B/D.
4. v
+
+
v
+
v
+
v
+
b
b
+
+
b
+
b
lg
+
lg
+
lg
+
+
lg
5. +
b
+
b
+
b
b
+
+
wx
wx
+
wx
+
wx
+
cn
+
cn
+
+
cn
cn
+
305
275
128
112
74
66
22
18
382
379
69
67
48
44
6
4