Final answer:
cDNA clones and EST clones would be missing the 5' UTR, as they are constructed from mRNA, which typically does not include the 5' UTR present in the primary RNA transcript.
Step-by-step explanation:
The type of clones that would be missing the 5' UTR are cDNA clones. cDNA clones are constructed using mRNA as a template. Since the 5' UTR is an untranslated region present in the primary RNA transcript but not typically in the mature mRNA, which is reverse transcribed to cDNA, this region would not be present in cDNA clones. Genomic clones, such as gDNA clones, BAC clones, and YAC clones, retain all parts of the DNA, including the 5' UTR. EST clones, which are also derived from mRNA like cDNA clones, would lack the 5' UTR as well.