Final answer:
A chromosome map shows the linear order and relative distances of gene loci. Physical maps provide detailed information about the physical distance between genes or genetic markers.
Step-by-step explanation:
A chromosome map shows the linear order of gene loci present on a chromosome and the relative distances between them.
A physical map provides detailed information about the physical distance between genes or genetic markers.
It is a representation of the actual physical distance, in nucleotides, between them.
For example, researchers use physical maps, such as cytogenetic mapping, to estimate the approximate distance between genetic markers by analyzing stained sections of chromosomes under a microscope.