Why DNA of all humans are different?
Answers
Answer:
The DNA of all humans are different because the structures are diifferent.The nucleic acid is different...
Answer:
Every human genome is different because of mutations—"mistakes" that occur occasionally in a DNA sequence. When a cell divides in two, it makes a copy of its genome, then parcels out one copy to each of the two new cells. Theoretically, the entire genome sequence is copied exactly, but in practice a wrong base is incorporated into the DNA sequence every once in a while, or a base or two might be left out or added. These mistakes—"changes" might be a more accurate word, because they are not always bad news—are called mutations.
When a mutation occurs in a sex cell—a sperm or an egg—it can be passed along to the next generation of people. Your genome contains about 100 "new" mutations—changes that occurred as your parents' bodies made the egg and sperm cells that became you. These genome variations are uniquely yours. Other variations in your genome arose many generations ago and have been passed down from parent to child over the years, until they ended up in you. You probably share each one of these older variations with many other people all over the world, but still, no one else has the exact same combination of variations that you have.