Refer to the figure showing a single viral plaque that was split every 400 generations and grown in the presence of a mutagen. How many generations of evolution have occurred between the A lineage and the E lineage? Remember that evolution is occurring in both lineages.
A) 400
B) 800
C) 1,200
D) 1,600
E) 3,200

Question

Refer to the figure showing a single viral plaque that was split every 400 generations and grown in the presence of a mutagen.  How many generations of evolution have occurred between the A lineage and the E lineage? Remember that evolution is occurring in both lineages.
A) 400 
B) 800 
C) 1,200 
D) 1,600 
E) 3,200

Quizplus · Accepted Answer

Each split represents 400 generations, and there are four splits between the A and E lineages (A to B, B to C, C to D, and D to E). Therefore, 4 x 400 = 1,600 generations have occurred between the A and E lineages.

Refer to the Figure Showing a Single Viral Plaque That