This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 5 Principles Of Inheritance And Variation – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 19 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A women with 57 chromosomes due to three copies of chromosome 21 is characterized by A) Superfemaleness. B) Triploidy. C) Turner's syndrome. D) Down's syndrome. Show Answer Correct Answer: D) Down's syndrome. 2. Position of a gene on chromosome is called A) Locus. B) Factor. C) Cistron. D) Nucleosome. Show Answer Correct Answer: A) Locus. 3. How many true-breeding plant varieties of pea were selected by Mendel for his experiments? A) 14. B) 10. C) 7. D) 5. Show Answer Correct Answer: A) 14. 4. Inheritance of skin colour in human beings is an example of- A) Polygenic inheritance. B) Mendelian inheritance. C) Monogenic inheritance. D) Complementary genes. Show Answer Correct Answer: A) Polygenic inheritance. 5. Which three scientists independently rediscovered mendel's work? A) Avery, Mcleod, McCarty. B) Sutton, Morgan and Bridges. C) Bateson, Punnet and Bridges. D) De Vries, Correns and Tschermak. Show Answer Correct Answer: D) De Vries, Correns and Tschermak. 6. Column AColumn BI.Gene ..... A.HomozygoteII.TT ..... B.DNAIII. Alternate form of gene ..... C.Dihybrid crossIV.TtRr x TtRr ..... D.AlleleThe correct match is- A) I-B, II-A, III-D, IV-C. B) I-D, II-A, III-B, IV-C. C) I-D, II-B, III-A, IV-C. D) I-B, II-C, III-D, IV-A. Show Answer Correct Answer: A) I-B, II-A, III-D, IV-C. 7. Choose the option that shows recessive traits in pea plant A) Tall height. B) Violet flower. C) Axial flower position. D) Green seed colour. Show Answer Correct Answer: D) Green seed colour. 8. Which is an autosomal dominant disorder A) Thalassemia. B) Phenylketonuria. C) Albinism. D) Huntington's chorea. Show Answer Correct Answer: D) Huntington's chorea. 9. Pleiotropic gene has- A) Single genotype. B) Multiple genotype. C) Multiple phenotype. D) Single phenotype. Show Answer Correct Answer: C) Multiple phenotype. 10. In human beings, multiple genes are involved in the inheritance of A) Sickle cell Anaemia. B) Skin colour. C) Colour blindness. D) Phenylketonuria. Show Answer Correct Answer: B) Skin colour. 11. Christmas disease is another name for A) Sleeping sickness. B) Hemophilia. C) Hepatitis B. D) Down's syndrome. Show Answer Correct Answer: B) Hemophilia. 12. The inheritance pattern of a gene over generations among humans is studied by the pedigree analysis. Character studied in pedigree analysis is equivalent to A) Quantative trait. B) Mendelian trait. C) Maternal trait. D) Polygenic trait. Show Answer Correct Answer: B) Mendelian trait. 13. If the modified allele is equivalent to the unmodified allele, it results in A) Same phenotype. B) Transformation of substrate. C) Different phenotype. D) Both a and b. Show Answer Correct Answer: D) Both a and b. 14. Brown eyes are dominant over blue eyes. B-brown eyes. b-blue eyesBaby Ethan is homozygous recessive for blue eyesBaby Ethan's genotype is ..... A) Brown eyes. B) Blue eyes. C) B B. D) B b. E) B b. Show Answer Correct Answer: D) B b. 15. Infectious proteins are present in A) Gemini viruses. B) Prions. C) Viroids. D) Satellite viruses. Show Answer Correct Answer: B) Prions. 16. Distance between the gene and percentage of recombination shows A) A direct relationship. B) An inverse relationship. C) A parallel relationship. D) No relationship. Show Answer Correct Answer: A) A direct relationship. 17. Which of the following will not result in variations among siblings? A) Independent assortment of genes. B) Linkage. C) Crossing over. D) Mutation. Show Answer Correct Answer: B) Linkage. 18. Vehicles of heredity are- A) Genes. B) Chromosomes. C) Chromatin. D) Factors. Show Answer Correct Answer: B) Chromosomes. 19. Analysis of traits of several generation of a family in the form of diagram is called A) Gene analysis. B) Chromosome analysis. C) Allele analysis. D) Pedigree analysis. Show Answer Correct Answer: D) Pedigree analysis. 20. What is the definition of linkage in genetics? A) The process of crossing over. B) The tendency of genes to be inherited together. C) The mutation of genes. D) The separation of alleles during gamete formation. Show Answer Correct Answer: B) The tendency of genes to be inherited together. 21. Human skin colour and Human height are examples of- A) Pleiotropy. B) Polygenic inheritance. C) Codominance. D) Multiple allelism. Show Answer Correct Answer: B) Polygenic inheritance. 22. How many maximum different types of gametes can be formed by a diploid organism if it is homozygous for one locus and heterozygous for three loci? A) 2. B) 4. C) 6. D) 8. Show Answer Correct Answer: D) 8. 23. In a population of 960 progenies obtained as a result of monohybrid cross between two axially and terminally placed flower in Pisum sativum. Assuming complete segregation in the gamete formation, how many progenies will be having terminally located flowers? A) 240. B) 720. C) 480. D) 143. Show Answer Correct Answer: A) 240. 24. 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 the 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. Show Answer Correct Answer: B) Sex-linked dominant. 25. A cross between two tall plants resulted in offspring having few dwarfplants. What would be the genotypes of both the parents? A) TT and Tt. B) Tt and Tt. C) TT and TT. D) Tt and tt. Show Answer Correct Answer: B) Tt and Tt. ← PreviousNext →Related QuizzesClass 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 1Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 2Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 3Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 4Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 5Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 6Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 7Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 8Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 9Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books