The appearance of a novel phenotype resulting from the substitution of a single base pair might be due to
A)a change in the amino acid sequence.
B)a change in the amount of protein expressed.
C)an alteration in a gene that codes for a nontranslated RNA.
D)a change in the developmental time or location at which a gene is expressed.
E)All of the choices are possible consequences of a single base pair substitution.

Question

Quizplus · Accepted Answer

A single base pair substitution can lead to various outcomes, including a change in the amino acid sequence of a protein (which can alter its function), a change in the amount of protein expressed (by affecting regulatory elements or mRNA stability), an alteration in a gene that codes for a nontranslated RNA (affecting its function or production), and a change in the developmental time or location at which a gene is expressed (by affecting regulatory elements). All these changes can result in the appearance of a novel phenotype.

The Appearance of a Novel Phenotype Resulting from the Substitution