This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 5 Principles Of Inheritance And Variation – Quiz 16 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 16 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1:2:1. It represents a case of: A) Co-dominance. B) Dihybrid cross. C) Monohybrid cross with complete dominance. D) Monohybrid cross with incomplete dominance. Show Answer Correct Answer: D) Monohybrid cross with incomplete dominance. 2. Mutation can be induced with A) Infrared radiation. B) IAA. C) Ethylene. D) Gamma radiation. Show Answer Correct Answer: D) Gamma radiation. 3. A specific characteristics. Mendel looked at 7 different ..... in peas such as color and shape. A) Trait. B) Allele. C) Self-pollination. D) Cross-pollination. Show Answer Correct Answer: A) Trait. 4. Dwarfness A) Is a phenotype which is dominant over tallness. B) Is expressed by a pair of dissimilar alleles. C) Was not get expressed in F1 generation of monohybrid cross. D) Is related with Tt genotype. Show Answer Correct Answer: C) Was not get expressed in F1 generation of monohybrid cross. 5. Linkage was discovered by A) Mendel. B) Morgan. C) Crick. D) Muller. Show Answer Correct Answer: B) Morgan. 6. The law based on fact that the characters do not show any blending and both the characters are recovered as such in F2-generation although one character was absent in F1-progeny, is A) Law of purity of gametes. B) Law of independent assortment. C) Law of incomplete dominance. D) Law of dominance. Show Answer Correct Answer: A) Law of purity of gametes. 7. Monohybrid F2 and dihybrid F2 can have the following similarity A) Both are formed by cross-pollination. B) Both are formed by self pollination. C) Both are having same phenotypic ratio. D) Both are having same genotypic ratio. Show Answer Correct Answer: B) Both are formed by self pollination. 8. The number of gametes formed from selfing the F1 generation in a dihybrid cross is A) 4. B) 2. C) 16. D) 8. Show Answer Correct Answer: D) 8. 9. On crossing two heterozygous tall plants (Tt), a total of 500 plants were obtained in F$_{1}$ generation. What will be the respective number of tall and dwarf plants obtained in F$_{1}$ generation? A) 375, 125. B) 250, 250. C) 475, 25. D) 350, 150. Show Answer Correct Answer: A) 375, 125. 10. In his Cross 1 on Drosophila, T.H.Morgan crossed between- A) Yyww X y+y+w+w+. B) Y+y+ww X yyw+w+. C) Yyw+w+ X y+y+ww. D) Yyww X wwmm. Show Answer Correct Answer: A) Yyww X y+y+w+w+. 11. Occasionally, a single gene may express more than one effect. Thephenomenon is called: A) Multiple allelism. B) Mosaicism. C) Pleiotropy. D) Polygeny. Show Answer Correct Answer: C) Pleiotropy. 12. In most species, mitochondrial DNA is passed down from- A) DNA. B) Mother and Father. C) Father. D) Mother. Show Answer Correct Answer: B) Mother and Father. 13. What is the probability that a cross between a true breeding pea plant with smooth seeds and a true breeding pea plant with wrinkled seeds will produce F1 progeny with smooth seeds? A) 1/2. B) 1/4. C) 0. D) 1. Show Answer Correct Answer: D) 1. 14. John has 2 genes for blue eyes. His GENEOTYPE is ..... A) Homozygous. B) Heterozygous. C) All the above. D) None of the above. Show Answer Correct Answer: A) Homozygous. 15. The recessive genes located on X chromosome in humans are always A) Lethal. B) Sub lethal. C) Expressed in males. D) Expressed in females. Show Answer Correct Answer: C) Expressed in males. 16. In his classic experiments on garden pea, Mendel did not use A) Seed colour. B) Pod length. C) Seed shape. D) Flower colour. Show Answer Correct Answer: B) Pod length. 17. IN THE TEST CROSS A) UNKNOWN HYBRID IS CROSSED WITH HOMOZYGOUS DOMINANT PARENT. B) UNKNOWN HYBRID IS CROSSED WITH HETEROZYGOUS PARENT. C) UNKNOWN HYBRID IS CROSSED WITH HOMOZYGOUS RECESSIVE PARENT. D) NONE OF THE ABOVE. Show Answer Correct Answer: C) UNKNOWN HYBRID IS CROSSED WITH HOMOZYGOUS RECESSIVE PARENT. 18. Person having genotype /$^{A }$/$^{B }$would show the blood group as AB. This is because of A) Pleiotropy. B) Co-dominance. C) Segregation. D) Incomplete dominance. Show Answer Correct Answer: B) Co-dominance. 19. The gene that is hidden unless both genes are present. A) Dominant. B) Recessive. C) Homozygous. D) Heterozygous. Show Answer Correct Answer: B) Recessive. 20. If linkage was known at the time of Mendel then which of the following laws, he would not have been able to explain? A) Law of Dominance. B) Law of Independent Assortment. C) Law of Segregation. D) Law of Purity of gametes. Show Answer Correct Answer: B) Law of Independent Assortment. 21. Y-linked genes are holandric genes A) True. B) False. C) Can not be determined. D) None of the above. Show Answer Correct Answer: A) True. 22. Phenotype of an organism is the result of A) Genotype and environment interactions. B) Mutations and linkages. C) Cytoplasmic effects and nutrition. D) Environmental changes and sexual dimorphism. Show Answer Correct Answer: A) Genotype and environment interactions. 23. Which of the following statement is considered to be universal? A) Within a pair of factors, one always dominates the other. B) Two factors of a trait separates during gamete formation. C) Blending of traits do not occur. D) None of the statements are universal. Show Answer Correct Answer: B) Two factors of a trait separates during gamete formation. 24. Fruit color in squash in an example of A) Recessive epistasis. B) Dominant epistasis. C) Complementary genes. D) Inhibitory genes. Show Answer Correct Answer: B) Dominant epistasis. 25. Chromosomal theory of inheritance was given by A) Morgan et al. B) Sutton and Boveri. C) Hugo de Vires. D) Gregor J. Mendel. Show Answer Correct Answer: B) Sutton and Boveri. ← 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