A gene is defined as which of the following?

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Study for the ELANCO Advanced Animal Science Exam. Enhance your knowledge with flashcards and multiple choice questions, with hints and explanations for each question. Get ready for your exam!

Multiple Choice

A gene is defined as which of the following?

Explanation:
A gene is a specific segment of DNA that carries the instructions to make a product that determines a trait. Genes sit on chromosomes, but they are not the entire chromosome, nor are they the protein or the cell itself. The defining role of a gene is its coding sequence that leads to a functional product—usually a protein or an RNA molecule—that influences how a trait is expressed. That’s why describing a gene as a segment of DNA that codes for a trait is the most accurate choice. The other statements are less precise: a portion of DNA on chromosomes could include non-gene regions; a protein is the product of a gene, not the gene itself; a cell is a much larger unit.

A gene is a specific segment of DNA that carries the instructions to make a product that determines a trait. Genes sit on chromosomes, but they are not the entire chromosome, nor are they the protein or the cell itself. The defining role of a gene is its coding sequence that leads to a functional product—usually a protein or an RNA molecule—that influences how a trait is expressed. That’s why describing a gene as a segment of DNA that codes for a trait is the most accurate choice. The other statements are less precise: a portion of DNA on chromosomes could include non-gene regions; a protein is the product of a gene, not the gene itself; a cell is a much larger unit.

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