Genetic Disorders Quiz - CBSE Class 12 Biology

Free practice quiz: Genetic Disorders (CBSE Class 12 Biology). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 12 Biology practice quiz has 20 multiple-choice questions on Genetic Disorders, and 20 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which of the following is a chromosomal disorder?

   1. Phenylketonuria
   2. Sickle cell anemia
   3. Down syndrome
   4. Albinism
   Show answer

   Answer: C. Down syndrome

   Down syndrome is a chromosomal disorder caused by an extra copy of chromosome 21. Phenylketonuria, sickle cell anemia, and albinism are genetic disorders but not chromosomal disorders.

2. Klinefelter syndrome is characterized by which chromosomal abnormality?

   1. XXY
   2. XO
   3. XXX
   4. XYY
   Show answer

   Answer: A. XXY

   Klinefelter syndrome is characterized by the presence of an extra X chromosome in males (XXY).

3. How can genetic counseling help individuals with a family history of genetic disorders?

   1. It can guarantee the prevention of all genetic disorders.
   2. It provides information about the risk of having a child with a genetic disorder.
   3. It is unnecessary if there is no known family history of genetic disorders.
   4. It directly changes the genetic makeup of the individual.
   Show answer

   Answer: B. It provides information about the risk of having a child with a genetic disorder.

   Genetic counseling helps assess the risk of inheriting or passing on a genetic disorder, offering options for family planning and reproductive choices.

4. Which of the following is NOT a common symptom of cystic fibrosis?

   1. Persistent cough
   2. Frequent lung infections
   3. Salty-tasting skin
   4. Muscle weakness
   Show answer

   Answer: D. Muscle weakness

   While cystic fibrosis can affect multiple systems, muscle weakness is not a typical symptom.

5. Explain how amniocentesis can be used in prenatal diagnosis of genetic disorders.

   1. Amniocentesis analyzes fetal DNA from maternal blood.
   2. Amniocentesis is a non-invasive procedure.
   3. Amniocentesis examines a sample of amniotic fluid surrounding the fetus.
   4. Amniocentesis directly examines fetal chromosomes in real time.
   Show answer

   Answer: C. Amniocentesis examines a sample of amniotic fluid surrounding the fetus.

   Amniocentesis involves extracting amniotic fluid that contains fetal cells, which can be analyzed for chromosomal abnormalities or genetic mutations.

More questions in this quiz

Answers and explanations are in the full quiz.

1. What causes Turner syndrome?
2. Which genetic disorder is characterized by the inability to produce melanin?
3. What is the inheritance pattern of hemophilia?
4. Explain the difference between a chromosomal disorder and a gene mutation.
5. Which genetic disorder is caused by a defect in the gene encoding the cystic fibrosis transmembrane conductance regulator (CFTR) protein?
6. What is the molecular basis of sickle cell anemia?
7. Discuss the ethical considerations surrounding genetic testing and the potential for genetic discrimination.
8. What is the difference between a genotype and a phenotype?
9. Phenylketonuria (PKU) is caused by a defect in which metabolic pathway?
10. Huntington's disease is caused by which type of mutation?
11. What is the primary mode of inheritance for autosomal recessive disorders?
12. Describe the concept of genetic heterogeneity.
13. What is the role of carrier testing in genetic counseling?
14. Discuss the implications of advances in gene editing technologies for treating genetic disorders.
15. Analyze the societal impact of genetic disorders and the need for comprehensive healthcare strategies.

More quizzes

• Inheritance Patterns▶ Play
• Principles of Inheritance▶ Play
• DNA Structure▶ Play

Browse all Genetics quizzes

More to play