This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 5 Principles Of Inheritance And Variation – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments? A) Eight. B) Seven. C) Five. D) Six. Show Answer Correct Answer: B) Seven. 2. A trait that "overpowers" and hide another trait is called: A) Overpowering trait. B) Complex trait. C) Recessive trait. D) Dominant Trait. Show Answer Correct Answer: D) Dominant Trait. 3. Which of the following disorders is an example of a chromosomal disorder? A) Sickle cell anemia. B) Phenylketonuria. C) Down's syndrome. D) Thalassaemia. Show Answer Correct Answer: C) Down's syndrome. 4. In 3200 progeny obtained in F2 Generation of cross between pure tall round and dwarf wrinkled then number of pure recessive progeny is A) 400. B) 300. C) 200. D) 100. Show Answer Correct Answer: C) 200. 5. Law of independent assortment can be explained with the help of A) Dihybride. B) Test cross. C) Back cross. D) Monohybride cross. Show Answer Correct Answer: A) Dihybride. 6. The possibility of a female becoming hameophilic is extremely rare because mother of such a female has to be at least (i) and father should be (ii). A) (i) haemophilic, (ii) carrier. B) (i) carrier, (ii) haemophilic. C) (i) haemophilic, (ii) normal. D) (i) haemophilic, (ii) haemophilic. Show Answer Correct Answer: B) (i) carrier, (ii) haemophilic. 7. A child has blood group 'O'. If father has blood group 'A' and mother has blood group 'B', work out the genotypes of the parents. A) |$^{A}$|$^{A}$ and l$^{B}$i. B) |$^{A}$i and l$^{B}$i. C) L$^{A}$i and ii. D) Ii and l$^{B}$l$^{B}$. Show Answer Correct Answer: B) |$^{A}$i and l$^{B}$i. 8. In an albino the number of melanocytes are normal. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 9. Phenylketonuria (PKU) is an inherited disease which refers to A) Decrease in phenylalanine in tissue and blood. B) Increase in phenyl pyruvic acid in tissue and blood. C) Elimination of sugar in urine. D) Elimination of uric acid in urine. Show Answer Correct Answer: B) Increase in phenyl pyruvic acid in tissue and blood. 10. The total number of pure lines prepared by Mendel for his hybridization experiment in Pisum sativum was A) 14. B) 2. C) 7. D) 34. Show Answer Correct Answer: A) 14. 11. Scientist who proposed genetic control of Rh factor A) Landsteiner. B) Louis Pasteur. C) Fisher and Rays. D) Flemming. Show Answer Correct Answer: C) Fisher and Rays. 12. Number of autosomes present in liver cells of a human female is A) 22 autosomes. B) 22 pairs. C) 23 autosomes. D) 23 pairs. Show Answer Correct Answer: B) 22 pairs. 13. What is the ratio of dominant to recessive traits in the F2 generation according to Mendel's experiments? A) 1:1. B) 2:1. C) 3:1. D) 4:1. Show Answer Correct Answer: C) 3:1. 14. In which of the following cases are maximum types of gametes possible? A) AABB. B) AABb. C) AaBb. D) AaBb. Show Answer Correct Answer: C) AaBb. 15. When a single gene causes more than one effect, it is called A) Multiple allele. B) Pleiotropy. C) Polygenes. D) Quantitative inheritance. Show Answer Correct Answer: B) Pleiotropy. 16. Gene I in humans is responsible for determining the? A) Skin colour. B) Antirrhinum flower colour. C) Sugar polymer on plasma membrane of red blood cell. D) Height. Show Answer Correct Answer: C) Sugar polymer on plasma membrane of red blood cell. 17. The characters which appear in the first filial generation are called A) Recessive characters. B) Dominant characters. C) Holandric characters. D) Lethal characters. Show Answer Correct Answer: B) Dominant characters. 18. How many different kinds of gametes will be produced by a plant having the genotype AABbCC A) 4. B) 9. C) 2. D) 3. Show Answer Correct Answer: C) 2. 19. An individual affected by phenylketonuria lacks an enzyme that converts the amino acid ..... into ..... A) Tyrosine, phenylalanine. B) Phenylalanine, tyrosine. C) Homogentistic acid, phenylalanine. D) Homogentisic acid, tyrosine. Show Answer Correct Answer: B) Phenylalanine, tyrosine. 20. The colour based contrasting traits in seven contrasting pairs, studied by Mendel in pea plant were A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 21. An individual depicts following symptoms:i.Short stature with small round head ii.Congenital heart diseaseiii.Mental and physical retardationThe individual is diagnosed with A) Turner's syndrome. B) Phenylketonuria. C) Down's syndrome. D) Klinefelter's syndrome. Show Answer Correct Answer: C) Down's syndrome. 22. What type of mutation is a frame-shift mutation? A) An insertion or deletion of nucleotides. B) A mutation that does not affect the protein. C) A substitution of one base for another. D) A change in a single nucleotide. Show Answer Correct Answer: A) An insertion or deletion of nucleotides. 23. How many pairs of contrasting characters in pea plants were studied by Mendel? A) Five. B) Six. C) Eight. D) Seven. Show Answer Correct Answer: D) Seven. 24. One of a number of different forms of a gene. The two ..... for pea color is yellow and green. A) Trait. B) Allele. C) Self-pollination. D) Cross-pollination. Show Answer Correct Answer: B) Allele. 25. The chromosomes responsible for the determination of sex are known as A) Autosomes. B) Allosomes. C) Heterosis. D) Multiple alleles. Show Answer Correct Answer: B) Allosomes. ← 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