Final answer:
Homologous chromosomes in a pair come from different parents, contain the same genes in order, show similar banding patterns after staining, but have different alleles, making them similar but not identical.
Step-by-step explanation:
The chromosomes in each of the 22 homologous pairs in our cells are not identical in every aspect. While homologous chromosomes are the same length and have the same genes in the same order, the two chromosomes in a homologous pair contain alleles that may differ because one is inherited from the mother and the other from the father. The banding patterns after Giemsa staining appear similar due to the structural similarities, but the DNA sequence is not exactly the same because of the different alleles. Therefore, the chromosomes in a homologous pair show identical banding patterns after Giemsa staining and are derived from one of our parents, but they do not have the exact same DNA sequence nor bear different sets of genes.