This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 5 Principles Of Inheritance And Variation – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 1 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In Grasshopper- A) Male is Homogametic and Female is Heterogametic. B) XX-XO Mechanism is present. C) Male is Heterogametic and Female is Homogametic. D) Both 2 and 3. Show Answer Correct Answer: D) Both 2 and 3. 2. Skin color in humans is an example of A) Complementary gene. B) Supplementary gene. C) Quantitative inheritance. D) Pleiotropy. Show Answer Correct Answer: C) Quantitative inheritance. 3. There are more right-handed people in the world. A) Law of Dominance. B) Law of Segregation. C) Law of Independent Assortment. D) None of the above. Show Answer Correct Answer: A) Law of Dominance. 4. If both parents are carriers for thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child A) 50%. B) 25%. C) 100%. D) No chance. Show Answer Correct Answer: B) 25%. 5. Which one is sex-linked disease in man? A) Polio. B) Alzheimer's disease. C) Hemophilia. D) Beriberi. Show Answer Correct Answer: C) Hemophilia. 6. Linked genes on homologous chromosome can be separated due to A) Recombination. B) Inversion. C) Point mutation. D) None of these. Show Answer Correct Answer: A) Recombination. 7. Person having genotype IA IB would show the blood group as AB. This isbecause of: A) Pleiotropy. B) Co-dominance. C) Segregation. D) Incomplete dominance. Show Answer Correct Answer: B) Co-dominance. 8. Select the disease which is caused by recessive autosomal genes when present in homozygous condition A) Alkaptonuria. B) Thalassemia. C) Cystic fibrosis. D) All of these. Show Answer Correct Answer: D) All of these. 9. In a monohybrid cross between two heterozygous individuals, percentage of pure homozygous individuals obtained in F$_{1}$ generation will be A) 25%. B) 50%. C) 75%. D) 100%. Show Answer Correct Answer: B) 50%. 10. I. Short statured body with small round head. II. Furrowed tongue and partially opened mouth. III. Palm is broad with characteristic palm crease. IV. Slow physical, psycomotor and mental development. These are the characters of A) Down's syndrome. B) Turner's syndrome. C) Klinefelter's syndrome. D) Edward syndrome. Show Answer Correct Answer: A) Down's syndrome. 11. XO type of sex determination and XY type of sex determination are the examples of A) Male heterogamety. B) Female heterogamety. C) Male homogamety. D) Both (b) and (c). Show Answer Correct Answer: A) Male heterogamety. 12. Which of the following related to genetics is universally applicable? A) Law of dominance. B) Law of segregation. C) Law of independent assortment. D) Law of incomplete dominance. Show Answer Correct Answer: B) Law of segregation. 13. How many gametes are required for F2 generation of a monohybrid cross? A) 2. B) 4. C) 16. D) 8. Show Answer Correct Answer: B) 4. 14. If your genotype is Bb, then you can only pass a B or b to your child but you can't pass both. A) Law of Dominance. B) Law of Segregation. C) Law of Independent Assortment. D) None of the above. Show Answer Correct Answer: B) Law of Segregation. 15. The human blood group AB, is coded by genes that shows ..... A) Law of Dominance. B) Law of Codominance. C) Law of incomplete dominance. D) None of the above. Show Answer Correct Answer: B) Law of Codominance. 16. Which of the following will not result in variation among siblings A) Independent assortment of genes. B) Crossing over. C) Linkage. D) Mutation. Show Answer Correct Answer: C) Linkage. 17. A human male produces sperms with the genotype AB, Ab, aB and ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of this person? A) AaBB. B) AABb. C) AABB. D) AaBb. Show Answer Correct Answer: D) AaBb. 18. Which one from those given below is the period for Mendels hybridization experiments A) 1840-1850. B) 1857-1869. C) 1870-1877. D) 1856-1863. Show Answer Correct Answer: D) 1856-1863. 19. Which one of the following is an example of polygenic Inheritance A) Production of male honey bee. B) Pod shape in garden pea. C) Skin colour in humans. D) Flower colour in Mirabilis jalpa. Show Answer Correct Answer: C) Skin colour in humans. 20. ..... are cells that join to make offspring A) Speed cells. B) Sex cells. C) Pea cells. D) Pedigree cells. Show Answer Correct Answer: B) Sex cells. 21. ABO blood groups is determined by A) Three recessive alleles. B) Three codominant alleles. C) Three alleles, two dominant and one recessive. D) Three alleles, two recessive and one dominant. Show Answer Correct Answer: C) Three alleles, two dominant and one recessive. 22. The term 'linkage'was coined by A) T. H. Morgan. B) T Boveri. C) G Mendel. D) W Sutton. Show Answer Correct Answer: A) T. H. Morgan. 23. In four o' clock plants, the gene for red flower colour (R) is in incompletely dominant over the gene for white flower colour (r), hence the plants heterozygous for flower colour (Rr) have pink flowers. What will be the ratio of offsprings in a cross between red flowers and pink flowers? A) 75% red flowers, 25% pink flowers. B) All red flowers. C) 50% red flowers, 50% pink flowers. D) Red:pink:white::1:2:1. Show Answer Correct Answer: C) 50% red flowers, 50% pink flowers. 24. Which of the following trait is controlled by sex linked recessive genes? A) Polydactyly. B) Huntington's chorea. C) PTC (Phenylthiocarbamide) tasting. D) Haemophilia. Show Answer Correct Answer: D) Haemophilia. 25. Who rediscovered Mendel's work and when- A) In 1992, De Vries, Correns and Von Tschermak Independently. B) In 1990, De Vries, Correns and Von Tschermak Together. C) In 1990, De Vries, Correns and Von Tschermak Independently. D) In 1990, De Vries, Correns and Von Tschermak Together. Show Answer Correct Answer: C) In 1990, De Vries, Correns and Von Tschermak Independently. Next →Related QuizzesClass 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 10Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books