Samples loaded at this end for forensics (the science of investigating crimes), paternity testing, and the identification of human remains. Biologists assume that populations are in HW equilibrium. This can become a matter of some significance in high-profile legal disputes. Consider this diagram of a DNA fingerprint in which each band represents a specific DNA sequence. The different shading of the bands is used to symbolize different genetic loci that were tested. A genetic locus is like a gene; it has a particular location and sequence on a chromosome, but it may not code for a protein. Individual A has 2 bands for a locus (the solid black bands), while Individual B has only 1 band. Use the terms heterozygous and homozygous to explain this difference.
Suppose the frequencies of the alleles are measured in the population and these data are obtained:
- Frequency of fast allele:
- Frequency of slow allele:
- Locus solid black bands:
- Locus gray bands:
- Locus dotted bands:
A sample of blood from the crime scene shows the same banding pattern as Individual B. If the population is in HW equilibrium, what is the probability that the blood from the crime scene came from Individual B?