Since the DNA standard had another marker at 50 mm from the origin, we can interpolate the size of the fragment that corresponds to this distance.
Looking at Table 2, we can see that the closest distances to 50 mm from the origin are 45 mm and 47 mm.
Interpolating between these two distances:
Size of fragment at 45 mm = 2328 bp
Size of fragment at 47 mm = 2027 bp
Using linear interpolation formula:
Size of fragment at 50 mm = 2027 + (50 - 47) * (2328 - 2027) / (47 - 45) = 2027 + 3 * 301 / 2 = 2027 + 451.5 = 2478.5 bp
Therefore, a possible size of the fragment corresponding to 50 mm from the origin is 2478.5 bp.
Gel electrophoresis is a technique used by molecular biologists to analyze samples of DNA or proteins. DNA was collected from the scene of a crime. Gel electrophoresis was used to compare the crime scene DNA to the victim’s DNA along with the two suspects of the crime.
Figure 1 shows the gel sheet after each sample was run. Table 1 shows the distance each band traveled from the origin. The samples were run in the same gel with a DNA standard marker for comparison. Table 2 shows the results of the standard.
Figure 1. Created for Albert. All rights reserved.
Table 1
Standard (
mm
) Crime Scene (
mm
) Suspect 1 (
mm
) Suspect 2 (
mm
) Victim (
mm
)
18
29
26
29
8
23
33
29
33
18
28
34
30
34
25
34
35
32
35
30
45
47
36
47
32
47
48
48
34
Table 2
Distance (
mm
) Size of Fragment in Base Pairs (
bp
)
18
23109
23
9416
28
6557
34
4361
45
2328
47
2027
Assume the DNA standard had another marker
50
mm
from the origin.
Which of the following is a possible size of this fragment?
1 answer
1 answer