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Course: Middle school biology - NGSS  > Unit 7

Lesson 3: Mutations
Science
Middle school biology - NGSS
Inheritance and variation
Mutations
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Problem

The figures below illustrate a mutation in an organism’s gene sequence.
Figure 1 shows the normal nucleotide sequence of a gene. Figure 1 also shows the amino acids encoded by that gene.
Figure 1 shows the gene sequence A C T G T G C T A. This gene sequence is shown to encode a series of amino acids, which are represented by colored circles in the following order: yellow, green, blue.
Figure 2 shows the same gene, but with a mutation. Figure 2 shows the amino acids encoded by the mutant version of the gene.
Figure 2 shows the gene sequence A C T G T C C T A. This sequence is labeled gene sequence with mutation. The second C in the sequence is colored red, indicating that it is the site of the mutation. The gene sequence is shown to encode a series of amino acids, which are represented by colored circles in the following order: yellow, green, blue.
Which of these best predicts the effect of the mutation on the organism?
Choose 1 answer: