Principles of Inheritance and Variation MCQ

Important Questions on Principles of Inheritance and Variation

1. If a hybrid expresses a character, it is called _________ 

1. Epistasis
2. Dominant
3. Co-dominant
4. Recessive

2. A plant having the genotype AABbCC will produce ______ kinds of gametes

1. 5
2. 4
3. 3
4. 2

3. Colour blindness is an _________ linked recessive trait

1. Z chromosome
2. Y chromosome
3. X chromosome
4. None of the above

4. In most species, mitochondrial DNA is passed down from 

1. DNA
2. Mother and Father
3. Father
4. Mother

5. Where are the genes for cytoplasmic male sterility in plants located?

1. Chloroplast genome
2. Mitochondrial genome
3. Cytosome
4. None of the above

6. _________ is a type of trait whose phenotype is influenced by more than one gene

1. Oncogenic Trait
2. Monogenic trait
3. Polygenic trait
4. None of the above

7. An individual’s collection of genes is called ______

1. Genotype
2. Phenotype
3. Trait
4. None of the above

8. A man marries a woman and both do not show any apparent traits of inherited disease. Five sons and two daughters are born, and three of their sons suffer from a disease. However, none of the daughters is affected. The following mode of inheritance for the disease is

1. Sex-linked recessive
2. Sex-linked dominant
3. Autosomal dominant
4. None of the above

9. A trait that “overpowers” and hide another trait is called

1. Overpowering trait
2. Complex trait
3. Recessive trait
4. Dominant Trait

10. Why is haemophilia a disease that is more commonly seen in males?

1. Both (2) and (3)
2. The disease is Y- linked
3. The disease is X- linked
4. None of the above

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