Q:

What makes a person unique?

A:

People are unique because one person's DNA differs from every other person's DNA. Even identical twins have very slight variations, according to About.com, although it's perhaps due to chemical changes that occur within their DNA as they age.

Humans have about 99.9 percent of their DNA in common, according to the Smithsonian National Museum of Natural History. The remaining 0.1 percent is unique among individuals, and it's that unique DNA that differentiates one person from the next.

DNA stands for dioxyribonuclean acid, which is a molecule found in the nuclei of all cells contained in living things. When cells divide, the new cells contain the exact same DNA material as the cells from which they came. This material consists of genes, which the National Institutes of Health's Genetics Home Reference describes as units of heredity. Genes, in turn, are made up of DNA chemical bases. The four bases are adenine, guanine, cytosine and thymine. They're referred to by their first letters: A, G, C and T. The bases serve as a genetic code.

Sugar and phosphate molecules attach to bases to form nucleotides. Strings of nucleotides make up DNA's double helix shape. The order of bases along the nucleotides establish all the information about a person. Unique base ordering among individuals accounts for the individuals' uniqueness.

Learn More

Related Questions

  • Q:

    How Many Human Races Are There?

    A:

    Technically there is only one human race, as humans today are 99.9% genetically identical even though physical appearances differ from one person to another. Most of the genetic differences that do exist are due to gender and unique individual traits.

    Full Answer >
    Filed Under:
  • Q:

    What makes a good engagement toast?

    A:

    Engagement toasts should be in-keeping with the spirit of the occasion, meaning lighthearted, fun and short. Like any speech, an engagement toast should also take into account the audience. In other words, it is best to avoid potentially offensive or embarrassing jokes, and particularly in-jokes that only the engaged couple are likely to understand.

    Full Answer >
    Filed Under:
  • Q:

    What makes up American culture?

    A:

    Food, religion, language and arts are just a few of the things that make up American culture. There is not one language or religion that defines American culture as the country is comprised of so many different values.

    Full Answer >
    Filed Under:
  • Q:

    How do you learn to trust again?

    A:

    Individuals can learn to trust again when the person who violated their trust consistently demonstrates honest behavior. According to Huffington Post and Psychology Today, individuals can also learn to trust again when they begin trusting their hunches and forgive past hurts.

    Full Answer >
    Filed Under:

Explore