An adult with a history of tanning has his genome sequenced. The beginning of a protein-coding region of his DNA reads ATATATGGCAT. If the protein-coding region of a healthy adult reads ATATATGAGCAT, identify the site and type of mutation.

Explanation:

The protein-coding region of a healthy adult reads ATATATGAGCAT.

The beginning of a protein-coding region of the tanning individual DNA reads ATATATGGCAT

The site of mutation is close to the end - GGCA - between the two G's, a base (A) has been deleted.

Thus this type of mutation is termed deletion: a process whereby one or more bases are removed from a nucleotide sequence of DNA.

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