Answers to "Some Genetics Problems"

1.

A. d r g

B.
r–d = 2.5 cM (3+2+11+9 ÷ 1000 = 0.025)
g–r = 12.5 cM (3+2+58+62 ÷ 1000 = 0.125)
d–g =15 cM (2.5 + 12.5)

C. 14 cM (58+62+11+9 ÷ 1000 = 0.140)

2.

3.

1 map unit (cM).

(2 × 5 ÷ 1000 = 0.01 = 1 map unit)

4.

Two cistrons: one containing r1 and r4, the other containing r2 and r3.