Can scientists tell by simply reading the gene exactly what a person looks like? For example: Can they look at a person and choose from a choice of genes readings =what it says on the chromosome?
Also, can a gene be used to identify a criminal let’s say? Like if they can’t get a genetic sampling of the suspects, but they have some genes from the scene of the crime, can they use the gene to identify the appearance of the criminal?

Suggested Reading:

Introduction to Genetic Analysis Solutions MegaManualA unique student resource combining a solutions manual with Paul Young's interactive Exploring Genetics tutorials.