AP BIOLOGY

Detailed explanation-1: -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-2: -A genetic alteration caused by the substitution of a single nucleotide for another nucleotide. Also called point variant.

Detailed explanation-3: -Point Mutations A point mutation is a change in a single nucleotide in DNA.

Detailed explanation-4: -In general, a mutation is when a gene is altered through a change in DNA structure; this may refer even to entire sections of chromosomes. A point mutation is specifically when only one nucleotide base is changed in some way, although multiple point mutations can occur in one strand of DNA or RNA.

Detailed explanation-5: -All mutations are changes in the nucleotide sequence of DNA, which occur by way of random mistakes. While some mutations involve large sections of DNA, point mutations are changes in the genetic sequence that occur at a specific point along the DNA strand.