Final answer:
The correct term for each chromosome in a homologous pair in a diploid cell is a 'homolog'.
Step-by-step explanation:
The term for each chromosome in a homologous pair in a diploid cell is referred to as a homolog. Homologous chromosomes, or homologs, are a matched pair containing the same genes in the same locations, or loci, although they may have different alleles. These pairs are derived from each parent; for instance, humans have 23 pairs, with one chromosome of each pair coming from the mother and the other from the father. The concept of a 'haploid' cell refers to cells that have only one set of chromosomes, such as gametes or reproductive cells.