Write a definition of homologous chromosomes using the terms “gene” and “allele.”

Homologous chromosomes contain the same genes and the same locations, or loci but may have different alleles. But jsut so this definition makes sense, lets define some of the words. 
A gene contains the traits that is passed down from two parents to its offspring. An allele is one part of a pair of genes that are located in a particular spot that controls the same trait.

Nucleus is the organelle that contains chromosomes