Textbook Question
Fill in the blanks: ________ are segments of DNA that code for a specific protein, and the human ________ includes over 20,000 of these segments.
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29. Heredity
Overview of Human Genetics
Multiple Choice
A permanent structural change of a gene is called __________.
A
trisomy
B
nondisjunction
C
linkage
D
mutation
Verified step by step guidance1
Understand the concept of a gene: A gene is a segment of DNA that contains the instructions for building a specific protein or set of proteins.
Recognize what a permanent structural change in a gene means: This refers to an alteration in the DNA sequence that makes up a gene.
Identify the term that describes a permanent change in the DNA sequence of a gene: This is known as a mutation.
Differentiate between the options provided: Trisomy is a condition where there is an extra chromosome, nondisjunction is an error in cell division, and linkage refers to genes that are located close to each other on a chromosome.
Conclude that the correct term for a permanent structural change in a gene is 'mutation', as it directly refers to changes in the DNA sequence.
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