A)the same genes in the same order.
B)the same genes in essentially the same order.
C)the same genes in reverse order.
D)different genes found on similar chromosomes.
E)duplication of entire genomes.

A)The distance between two linked markers is the same in genetic and physical maps because crossing over occurs with equal frequency along the entire length of the chromosome.
B)Restriction maps,contig maps,and STS maps are examples of physical maps.
C)In physical maps,the distances between markers are given in megabases (Mb)where 1 Mb is approximately equal to 1 cM.
D)The banding patterns of chromosomes created by different staining techniques are used in constructing cytogenetic maps.
E)In genetic maps,the distances between various markers (for example,genes or RFLPs)are given in map units or centiMorgans.

A)homologs.
B)orthologs.
C)paralogs.
D)heterologs.
E)alleles.