what are the values of studying population genetics?

Answer 1

Useful in many ways:
1. Group behaviour
2. Inter group behavioural patterns (between 2 homogenous groups)
3. Intra-group behavioural patterns (within the group)
4. IQ, EQ, etc can be determined.

Answer 2

Other than the purely scientific ones, of studying aspects of population structure, social structure, dispersal etc. in many species there are a number of practical applications:

Population genetic studies on human populations have revealed high incidence of certain genetic conditions, for example PKU in Britain, hence all babies are tested for this at birth. Also cystic fibrosis, about 1/20 people carry the allele for this and an understanding of the distribution of this allele contributes to early diagnosis and treatment in affected individuals.

Population genetics also has a massive role in conservation, designing management plans to prevent inbreeding, understanding the structure of populations so that management fits their natural behaviour, selecting individuals for release into the wild (e.g. Mongolian wild horse) and identifying closely related populations to help bolster struggling ones (e.g. red squirrel in Britain perhaps).

Monitoring the evolution of rapidly changing organisms, particularly viruses such as HIV and flu.