How can the two chromosomes that make up a homologous pair differ? they can contain different alleles for the same trait. they can contain genes that code for different traits. they can contain the same genes in different orders. they cannot differ in any way when homologous.

A homologous pair of chromosomes have the same genes in the same locations. However, they can be different forms of the genes (alleles). For example, at a given distance down the chromosome is the gene for height. On one chromosome could be an allele that codes for tall height, and on the other, one for short height. Hope this helps! :)

Active site is where they touch.

3. is true i think i should be right