Inheritance Patterns Quiz - CBSE Class 12 Biology

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

Sample questions

1. What is the basic unit of heredity?

   1. Chromosome
   2. Gene
   3. DNA
   4. RNA
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   Answer: B. Gene

   A gene is the basic unit of heredity that carries the information for a specific trait.

2. Which of the following can influence the expression of a trait?

   1. Environment
   2. Genotype
   3. Genetics
   4. All of the above
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   Answer: D. All of the above

   All these factors influence the expression of a trait, as they interact to determine phenotype.

3. Which phenomenon can disrupt Mendelian inheritance?

   1. Linkage
   2. Independent assortment
   3. Segregation
   4. Dominant traits
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   Answer: A. Linkage

   Linkage refers to genes located close together on a chromosome, which can lead to deviations from Mendelian inheritance predictions.

4. How can mutations affect inheritance patterns?

   1. They have no impact
   2. They can create new alleles
   3. They always cause disease
   4. They only affect dominant traits
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   Answer: B. They can create new alleles

   Mutations can lead to the emergence of new alleles in a population, thereby altering inheritance patterns over generations.

5. How can studying genetics help in agriculture?

   1. Improving yield
   2. Understanding soil composition
   3. Enhancing crop resistance
   4. Both improving yield and enhancing resistance
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   Answer: D. Both improving yield and enhancing resistance

   Genetic studies can lead to both improved yields and enhanced resistance in crops, benefiting agricultural practices.

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• Principles of Inheritance
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• Genetic Disorders

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