Q6. Which disorder is caused due to a defect in the dystrophin gene on the X chromosome?
- A. Cystic fibrosis
- B. Duchenne muscular dystrophy
- C. Huntington’s disease
- D. Sickle-cell anemia
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This page provides a free online MCQ test for NEET Biology preparation, focusing specifically on the chapter Principles of Inheritance and Variation. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.
Key concepts covered in this specific test include Following, Polygenic, Inheritance, Statement, Epistasis, and Incorrect.
Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.
Which of the following is an example of polygenic inheritance?
Hemophilia
Sickle-cell anemia
Human skin color
Cystic fibrosis
Which of the following is a correct statement about epistasis?
It occurs when one gene influences multiple traits.
It follows Mendel’s Law of Independent Assortment.
One gene masks the effect of another gene.
Epistasis is the same as pleiotropy.
Which of the following is an incorrect statement about linkage?
Linked genes are located close together on the same chromosome.
Genes far apart on a chromosome assort independently.
Linked genes always segregate independently.
Crossing over can break the linkage between genes.
Which of the following statements about genetic mutations is incorrect?
Frameshift mutations can be caused by insertions or deletions.
Silent mutations change the amino acid sequence of a protein.
Missense mutations result in a single amino acid change.
Nonsense mutations introduce a premature stop codon.
Which of the following statements about genes and alleles is incorrect?
A gene is a segment of DNA that codes for a protein.
Alleles are different versions of the same gene.
All genes have only two possible alleles.
Dominant alleles always express their trait in heterozygous individuals.
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