The master control gene sends signals to other genes in a sequence of DNA. Based on this diagram, a change in the sequence of the master control gene could affect how
a
gene 4 regulates the master control gene.
b
genes 1 and 2 regulate the expression of gene 3.
c
gene 1 regulates the expression of gene 3.
d
genes 1 and 3 regulate the expression of gene 2.
The correct answer is c) gene 1 regulates the expression of gene 3.
A change in the sequence of the master control gene could potentially disrupt the regulation of gene 3 by gene 1. This means that the expression of gene 3 could be altered or inhibited if there is a change in the sequence of the master control gene.