Which modification affect an organism's expressed characteristics while leaving its DNA sequence unchanged?

Question

a. substitution mutation
b. epigenetic change
c. deletion mutation
d. insertion mutation

Answer 1

The correct answer is:

b. epigenetic change

Epigenetic changes can affect an organism's expressed characteristics (phenotype) without altering the underlying DNA sequence. These changes can involve mechanisms such as DNA methylation and histone modification, which can regulate gene expression.