Final answer:
Repetitive DNA sequences can lead to disease if they undergo expansions that disrupt gene function, but they are also vital for chromosomal stability and gene regulation. The relationship between repetitive sequences and disease is complex.
Step-by-step explanation:
The statement that repetitive sequences of DNA are more likely to cause disease because of the irregular nature of the structure is partly true and partly false. Repetitive DNA sequences do have the potential to cause certain types of diseases, particularly when these sequences expand beyond a normal range. However, the presence of repetitive DNA alone is not an indicator of disease since repetitive sequences also play important roles in the structure and function of genomes.
Repetitive DNA sequences can be prone to mutations or expansions that disrupt normal gene function, which can result in conditions such as Huntington's disease or fragile X syndrome. Nonetheless, these sequences are also essential for chromosomal stability, segregation during cell division, and regulation of gene expression. Hence, the relationship between repetitive DNA sequences and disease is complex and depends on the type, location, and extent of the repetition, rather than the mere presence of repetitive structures.