AP BIOLOGY

Detailed explanation-1: -Mice. Humans and mice share nearly 90 percent of human DNA. This is important because mice have been used in laboratories as experimental animals for research into human disease processes for years.

Detailed explanation-2: -In Brief. Chimpanzees are the closest living relatives of humans and share nearly 99 percent of our DNA. Efforts to identify those regions of the human genome that have changed the most since chimps and humans diverged from a common ancestor have helped pinpoint the DNA sequences that make us human.

Detailed explanation-3: -Mice and humans share approximately 70 percent of the same protein-coding gene sequences, though these genes constitute just 1.5 percent of their respective genomes.

Detailed explanation-4: -Our feline friends share 90% of homologous genes with us, with dogs it is 82%, 80% with cows, 69% with rats and 67% with mice [1]. Human and chimpanzee DNA is so similar because the two species are so closely related. They both descended from a single ancestor species 6 or 7, 000, 000 years ago.

Detailed explanation-5: -Human, mouse and other mammals shared a common ancestor approximately 80 million years ago. Therefore the genomes of all mammals are comparably similar.