Human Heredity 11th Edition by Michael Cummings

Exercise 22

Transcriptional regulators are proteins that bind to promoters (the 59-flanking regions of genes) to regulate their transcription. Assume that a particular transcription regulator normally promotes transcription of gene X , a transport protein. If a mutation makes this regulator gene nonfunctional, would the resulting phenotype be similar to a mutation in gene X itself? Why or why not?