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In the twentieth century, the study of heredity took
giant leaps forward with the discovery of DNA.
DNA IS

the material that makes up genes
the result of a genotype test
a vitamin that prevents genetic diseases
a nutrient that helps humans grow taller

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DNA is the material that makes up genes.

The term DNA means Deoxyribonucleic acid. It has been found to be the hereditary material that is found in genes.

DNA is comprised of a double helix of complimentary amino acids arranged in specific sequences.

These specific arrangements of amino acids encode genetic information found in genes. This genetic information is replicated during cell division.

Learn more: https://brainly.com/question/264225