Human Heredity 11th Edition by Michael Cummings

Exercise 1

The pre-mRNA transcript and protein made by several mutant genes were examined. The results are given below. Determine where in the gene a likely mutation lies: the promoter region, exon, intron, cap on mRNA, or ribosome binding site.
A) normal-length transcript, normal-length nonfunctional protein
B) normal-length transcript, no protein made
C) normal-length transcript, normal-length mRNA, short nonfunctional protein
D) normal-length transcript, longer mRNA, shorter nonfunctional protein
E) transcript never made