AP BIOLOGY

Detailed explanation-1: -A deletion changes the DNA sequence by removing at least one nucleotide in a gene. Small deletions remove one or a few nucleotides within a gene, while larger deletions can remove an entire gene or several neighboring genes. The deleted DNA may alter the function of the affected protein or proteins.

Detailed explanation-2: -Incorrectly paired nucleotides that still remain following mismatch repair become permanent mutations after the next cell division.

Detailed explanation-3: -A point mutation occurs in a genome when a single base pair is added, deleted or changed. While most point mutations are benign, they can also have various functional consequences, including changes in gene expression or alterations in encoded proteins.

Detailed explanation-4: -Deletion. Deletions are mutations in which a section of DNA is lost, or deleted.

Detailed explanation-5: -DNA is a dynamic and adaptable molecule. As such, the nucleotide sequences found within it are subject to change as the result of a phenomenon called mutation.