Which of the following is used to determine a person's DNA sequence?

Rationale

Genes are used to determine a person's DNA sequence.

Genes are sections of DNA that carry the instructions for making proteins, which are the building blocks of the body. Each gene holds the information needed to build and maintain cells and pass genetic traits to offspring. Therefore, by analyzing the genes, scientists can determine a person's DNA sequence.

A (hormones) YOUR ANSWER

Hormones are chemical messengers produced in the endocrine glands that control many different bodily functions. They do not contain genetic information and, thus, cannot be used to determine a person's DNA sequence.

B (enzymes) YOUR ANSWER

Enzymes are proteins that speed up chemical reactions in the body. While enzymes are encoded by genes and are crucial for DNA replication and repair, they themselves do not hold genetic information. Therefore, they cannot be used to determine a person's DNA sequence.

C (blood types) YOUR ANSWER

Blood types are determined by the presence or absence of certain antigens on the surface of red blood cells. While blood types are genetically inherited, they provide very limited information about a person's entire DNA sequence. Therefore, blood types cannot be used to determine a person's full DNA sequence.

D (genes) CORRECT

Genes are sections of DNA that contain the information required to build and maintain an organism's cells and pass genetic traits to offspring. Each person's DNA sequence is unique and is found in their genes. Therefore, by studying a person's genes, scientists can determine their unique DNA sequence.

Conclusion

A person's DNA sequence, which is unique to each individual, is contained within their genes. Other factors like hormones, enzymes, and blood types are either products of genetic information or are influenced by it, but they do not contain the entire DNA sequence. Therefore, to determine a person's DNA sequence, scientists analyze their genes.

Which of the following is used to determine a person's DNA sequence?

Genes are used to determine a person's DNA sequence.

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