This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 5 Principles Of Inheritance And Variation – Quiz 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 11 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. ABO blood groups in human beings are controlled by the gene |. The gene | has three alleles-|$^{A}$, |$^{B}$ and i. Since there are three different alleles, six different genotypes are possible.How many phenotypes can occur? A) Six. B) Two. C) Three. D) Four. Show Answer Correct Answer: D) Four. 2. The genotype of a plant showing the dominant phenotype can be determined by A) Test cross. B) Dihybrid cross. C) Pedigree analysis. D) Back cross. Show Answer Correct Answer: A) Test cross. 3. Ratio in F2-generation is explained by A) Law of partial dominance. B) Law of dominance. C) Law of incomplete dominance. D) Law of purity of gametes. Show Answer Correct Answer: B) Law of dominance. 4. PKU is caused by mutation in a gene that codes for the enzyme A) Phenyl anhydrase. B) Phenyl alanine hydroxylase. C) Carboxylase. D) Urease. Show Answer Correct Answer: B) Phenyl alanine hydroxylase. 5. Mendel's Law was rediscovered by A) Correns, De Vries, Morgan. B) Correns, Tshermak, , Morgan. C) Correns, Tshermak, , Boveri. D) Correns, Tshermak, , deVries. Show Answer Correct Answer: D) Correns, Tshermak, , deVries. 6. If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is:- A) 0.75. B) 1. C) 0. D) 0.5. Show Answer Correct Answer: C) 0. 7. Which of the following most appropriately describes haemophilia? A) X-lnked recessive genetic disorder. B) Chromosomal disorder. C) Dominant gene disorder. D) Recessive gene disorder. Show Answer Correct Answer: A) X-lnked recessive genetic disorder. 8. A typical genotypic monohybrid ratio in Mendel's experiment is A) 1:3:1. B) 3:1. C) 1:2:1. D) 9:3:3:1. Show Answer Correct Answer: C) 1:2:1. 9. Which of the following is not the cause of Mendel's success in formulating basic principles of heredity? A) Garden pea was ideal for controlled breeding since cross pollination was easy. B) Mendel selected pea plants randomly from his garden for experiments. C) He used statistical method and laws of probability to analyse results. D) He studied inheritance of single character with two contrasting traits at a time. Show Answer Correct Answer: B) Mendel selected pea plants randomly from his garden for experiments. 10. What is the term for the genetic makeup of an organism? A) Phenotype. B) Genotype. C) Heterozygous. D) Homozygous. Show Answer Correct Answer: B) Genotype. 11. In sickle cell anemia glutamic acid is replaced by valine. Which one of the following triplets codes for valine? A) GGG. B) AAG. C) GAA. D) GUG. Show Answer Correct Answer: D) GUG. 12. T H MORGAN EXPERIMENTALLY VERIFIED CHROMOSOMAL THEORY OF INHERITANCE BY USING Drosophila melanogaster BECAUSE A) IT COMPLETES ITS LIFE CYCLE IN ABOUT TWO WEEKS. B) IT PRODUCES LARGE NUMBER OF PROGENIES IN SINGLE MATING. C) MALE IS DISTINCT FROM FEMALE. D) ALL OF THE ABOVE. Show Answer Correct Answer: D) ALL OF THE ABOVE. 13. A woman who is a carrier of a certain disease marries a man who is normal for this trait. They have five children (2 daughters and 3 sons). All sons suffer from the given disease but none of the daughters were affected as the disease show diagynic pattern. Which of the following could be this disease? A) Autosomal recessive disease. B) Sex-linked disease. C) Sex-limited disease. D) Autosomal dominant disease. Show Answer Correct Answer: B) Sex-linked disease. 14. The number of chromosomes in females and males honeybees are A) 32. B) 16. C) 32 and 16, respectively. D) 16 and 32, respectively. Show Answer Correct Answer: C) 32 and 16, respectively. 15. In a marriage between male with blood group A and female with blood group B, the progeny had either blood group AB or B. What could be the possible genotype of parents? A) I$^{A}$ i (Male) ; I$^{B}$ i (Female). B) I$^{A}$ i (Male) ; I$^{B}$ I$^{B}$(Female). C) I$^{A}$I$^{A}$(Male) ; I$^{B}$I$^{B}$ (Female). D) I$^{A}$ I$^{A}$ (Male) ; I$^{B}$ i (Female). Show Answer Correct Answer: B) I$^{A}$ i (Male) ; I$^{B}$ I$^{B}$(Female). 16. IF THE THE NUMBER OF CHROMOSOME IN QUEEN BEE IS 32 THEN WHAT WILL BE THE NUMBER OF CHROMOSOME IN WORKER BEE AND DRONE RESPECTIVELY? A) 32, 32. B) 32, 64. C) 32, 16. D) 16, 32. Show Answer Correct Answer: C) 32, 16. 17. How many of the following are Medelian disorders?Haemophilia, Cystic fibrosis, sickle cell anaemia, colour blindness, phenyl ketonuria, Thalesemia. A) 3. B) 4. C) 5. D) 6. Show Answer Correct Answer: D) 6. 18. The proportion of plants that were dwarf and tall, respectively in F2-generation of Mendel's experiment was A) $\frac{1}{4}$ $\frac{3}{4}$. B) $\frac{3}{4}$ $\frac{1}{4}$. C) $\frac{2}{3}$ $\frac{1}{3}$. D) $\frac{1}{3}$ $\frac{4}{3}$. Show Answer Correct Answer: A) $\frac{1}{4}$ $\frac{3}{4}$. 19. A polygenic inheritance in human being is A) Skin colour. B) Phenylketonuria. C) Colourblindness. D) Sickle-cell anaemia. Show Answer Correct Answer: A) Skin colour. 20. Which blood group is universal recipient? A) I$^{o}$. B) I$^{A}$. C) I$^{B}$. D) I$^{A}$ I$^{B}$. Show Answer Correct Answer: D) I$^{A}$ I$^{B}$. 21. Which of the following is not an example of recessive autosomal disease? A) Haemophilia. B) Cystic fibrosis. C) Phenlketonuria. D) Sickle-cell anaemia. Show Answer Correct Answer: A) Haemophilia. 22. Both husband and wife have normal vision though their fathers were colour blind. The probability of their daughter becoming colour blind is A) 0 %. B) 25 %. C) 50 %. D) 75 %. Show Answer Correct Answer: A) 0 %. 23. Albinism is a congenital disorder resulting from the lack of which enzyme? A) Tyrosinase. B) Xanthine oxidase. C) Catalase. D) Fructokinase. Show Answer Correct Answer: A) Tyrosinase. 24. Brown eyes are dominant over blue eyes. B-brown eyes. b-blue eyesBaby Ethan is homozygous recessive for blue eyesBaby Ethan's phenotype is ..... A) Brown eyes. B) Blue eyes. C) B B. D) B b. E) B b. Show Answer Correct Answer: B) Blue eyes. 25. Mendel's law of independent assortment holds good for genes situated on the A) Non homologous chromosomes. B) Homologous chromosomes. C) Extra nuclear genetic element. D) Same chromosome. Show Answer Correct Answer: B) Homologous chromosomes. ← 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