NCERT Biology Class 12, Chapter 5

Mutation and gene expression NEET-UG Biology MCQ

Which mechanism generally causes only a change in gene expression levels?

Aframeshift mutation

Bmissense mutation

Cnonsense mutation

Dhaploinsufficiency

Correct answer: D. haploinsufficiency

Haploinsufficiency refers to the condition where a reduction in the number of copies of a gene results in a decrease in the level of gene expression, leading to a loss of function. This mechanism generally causes only a change in gene expression levels.

More Mutation and gene expression MCQs

Due to a mutation that changes a coding codon into a termination codon, such a mutation is known as Which of the following is not a term used to describe mutations in structural genes?Huntington gene's first exon shows (CAG)n repeats, with less than 35 repeats considered normal and more than 35 leading to Huntington disease. This mechanism of disease caused by the change in (CAG)n repeat number is known as