The following methods can be used to detect the point mutation in the beta globin gene that causes sickle cell anemia, EXCEPT:

Point mutation involves the replacement of a single base nucleotide with another nucleotide of the gene. Point mutations in the beta globin gene can be identified by analysing the DNA. Nohern blot is a technique used in studying the RNA and hence the answer of exclusion. Ref: Introduction to Biotechnology By Thieman William, 2nd Edition, Pages 71, 78, 81, 82