Multiple Choice
Which of the following disorders is most accurately classified as a single-gene (Mendelian) disease?
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1. Introduction to Genetics
Fundamentals of Genetics
Multiple Choice
Which of the following best defines a gene?
A
A complete set of chromosomes found in a haploid gamete
B
Any region of DNA that is transcribed but not translated into protein
C
A protein that determines an organism’s phenotype for a particular trait
D
A segment of DNA that encodes a functional product (an RNA or a polypeptide) and includes associated regulatory sequences needed for its expression
Verified step by step guidance1
Understand that a gene is a fundamental unit of heredity in genetics, responsible for carrying information that determines traits.
Recognize that genes are segments of DNA, which contain the instructions to produce functional products necessary for cellular functions.
Note that these functional products can be either RNA molecules or polypeptides (proteins), depending on the gene's role.
Remember that a gene includes not only the coding sequence but also regulatory sequences that control when and how the gene is expressed.
Compare the given options to identify the one that correctly describes a gene as a DNA segment encoding a functional product along with its regulatory elements.
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