MCQ Questions on Principles of Inheritance and Variation
1. If a hybrid expresses a character, it is called _________
(a) Epistasis
(b) Dominant
(c) Co-dominant
(d) Recessive
Answer
Answer: (b) Dominant
2. A plant having the genotype AABbCC will produce ______ kinds of gametes
(a) 5
(b) 4
(c) 3
(d) 2
Answer
Answer: (d) 2
3. Colour blindness is an _________ linked recessive trait
(a) Z chromosome
(b) Y chromosome
(c) X chromosome
(d) None of the above
Answer
Answer: (c) X chromosome
4. In most species, mitochondrial DNA is passed down from
(a) DNA
(b) Mother and Father
(c) Father
(d) Mother
Answer
Answer: (d) Mother
5. Where are the genes for cytoplasmic male sterility in plants located?
(a) Chloroplast genome
(b) Mitochondrial genome
(c) Cytosome
(d) None of the above
Answer
Answer: (b) Mitochondrial genome
6. _________ is a type of trait whose phenotype is influenced by more than one gene
(a) Oncogenic Trait
(b) Monogenic trait
(c) Polygenic trait
(d) None of the above
Answer
Answer: (c) Polygenic trait
7. An individual’s collection of genes is called ______
(a) Genotype
(b) Phenotype
(c) Trait
(d) None of the above
Answer
Answer: (a) Genotype
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
(a) Sex-linked recessive
(b) Sex-linked dominant
(c) Autosomal dominant
(d) None of the above
Answer
Answer: (a) Sex-linked recessive
9. A trait that “overpowers” and hide another trait is called
(a) Overpowering trait
(b) Complex trait
(c) Recessive trait
(d) Dominant Trait
Answer
Answer: (d) Dominant Trait
10. Why is haemophilia a disease that is more commonly seen in males?
(a) Both (2) and (3)
(b) The disease is Y- linked
(c) The disease is X- linked
(d) None of the above
Answer
Answer: (c) The disease is X- linked