Gene and chromosomes show parallel behavior except:

Explanation

Genes are specific sequences of nucleotides within DNA that reside on chromosomes. A chromosome is a larger structure that contains many genes. Therefore, while they both play roles in inheritance, heredity, and share similar composition, they do not match in number. Humans typically have 23 pairs of chromosomes, each containing multiple genes. Thus, the number is the key aspect where they do not exhibit parallel behavior. Options B, C, and D are incorrect because they describe areas where genes and chromosomes show parallel behavior.