Page 11 - An Identity Crisis

Adult Adult
ALLELE Female Male Child Adult Male Firewood Fireplace
NAME Ladder Woman Child (Car) (Car) Woman (Cabin) (Cabin) (Cabin)
(Car) (Cabin)

VR20

VR15

VR10

VR06

VR03

Copy the labels and bands from a group that ran the other gel onto this schematic.

Determining Match Probability

Not every allele occurs in the general population 1. For each of the unknown samples, determine
with the same frequency, but, through research, the probability of a random person having those
these frequencies have been determined. The alleles given the frequencies below:
probability that a random person has a given
genotype can be determined by multiplying the
frequencies for those alleles together. If a person
is heterozygous, the combined frequency must be VR03 VR06 VR10 VR15 VR20 OFF
further multiplied by 2, because there are two ways LADDER
to inherit those alleles: allele 1 from the mother and 0.22 0.31 0.27 0.14 0.05 0.01
allele 2 from the father or vice versa.

COMBINED
SAMPLE FREQUENCY 1 FREQUENCY 2
FREQUENCY
CAR WRECK ADULT WOMAN 0.31 0.27 0.17
CAR WRECK FEMALE CHILD 0.31 0.05 0.03

CAR WRECK MALE CHILD 0.22 0.27 0.12
CABIN ADULT MALE 0.31 0.14 0.09

CABIN ADULT FEMALE 0.27 0.05 0.03
CABIN FIREPLACE 0.22 0.31 0.14

THE MYSTERY OF LYLE AND LOUISE 11