This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 5 Principles Of Inheritance And Variation – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Mark the odd one out with respect to the Law of Dominance A) Factors control every character of the body. B) Opposite pairs of factors are responsible for a character. C) The alternative forms of factors show codominance. D) Alternate forms of factors exist in pairs. Show Answer Correct Answer: C) The alternative forms of factors show codominance. 2. The chromosome constitution 2n-2 of an organism represents A) Monosomic. B) Nullisomic. C) Haploid. D) Trisomic. Show Answer Correct Answer: B) Nullisomic. 3. Which of the following are reasons for Mendel's success?(i) Usage of pure lines or pure breeding varieties(ii) Consideration of one character at a time(iii) Maintenance of statistical records of experiments(iv) Knowledge of linkage and incomplete dominance A) (i) and (ii) only. B) (i), (ii) and (iii). C) (i) and (iv) only. D) (ii), (iii) and (iv). Show Answer Correct Answer: B) (i), (ii) and (iii). 4. Of the seven characters studied by Mendel, which of the following trait mentioned below is incorrect? A) Axillary flower is dominant trait. B) Green colour seed is a recessive trait. C) Green colour pod is a recessive trait. D) Wrinkled seed is a recessive trait. Show Answer Correct Answer: C) Green colour pod is a recessive trait. 5. The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by: A) T.H. Morgan. B) Gregor J. Mendel. C) Alfred Sturtevant. D) Sutton Boveri. Show Answer Correct Answer: C) Alfred Sturtevant. 6. How many types of gametes will be produced by individuals of AABbcc genotype? A) Two. B) Four. C) Six. D) Nine. Show Answer Correct Answer: A) Two. 7. A blue fowl obtained from mating between black and white fowls, is self-crossed. The F2 ratio is A) 1 black:2 white:1 blue. B) 1 black:2 blue:1 white. C) 2 black:1 white:1 blue. D) None of these. Show Answer Correct Answer: B) 1 black:2 blue:1 white. 8. Find out the mismatched pair. A) Haemophilia-sex linked recessive. B) Cystic fibrosis-Autosomal recessive. C) Down's syndrome-Trisomy 21. D) Turner's syndrome-Y-linked. Show Answer Correct Answer: D) Turner's syndrome-Y-linked. 9. Mark the incorrect statement regarding Klinefelter's syndrome. A) Karyotype of individual is 47, XXY. B) The individual is sterile with feminine characters. C) Caused due to failure of segregation of chromatids during cell division. D) It is an example of mendelian disorder. Show Answer Correct Answer: D) It is an example of mendelian disorder. 10. On selfing a heterozygous round and yellow seeded plants, the production of heterozygous for both the traits would be A) 9/16. B) 3/16. C) 1/16. D) 4/16. Show Answer Correct Answer: D) 4/16. 11. In honeybees, females are (i) having (ii) chromosomes and males are (iii) having (iv) chromosomes. A) (i) diploid (ii) 46 (iii) haploid (iv) 23. B) (i) haploid (ii) 23 (iii) diploid (iv)46. C) (i) diploid (ii) 32 (iii) haploid (iv) 16. D) (i) haploid (ii) 16 (iii) diploid (iv) 32. Show Answer Correct Answer: C) (i) diploid (ii) 32 (iii) haploid (iv) 16. 12. If the child's blood group is O, father's blood group is A and mother's blood group is B. then the genotype of the parents will be A) I$^{A}$ I$^{A}$ and I$^{B }$I$^{O}$. B) I$^{A}$ I$^{o}$ and I$^{B}$ I$^{O}$. C) I$^{A}$ I$^{O}$ and I$^{O}$ I$^{O}$. D) I$^{O}$ I$^{O }$ and I$^{B}$ I$^{B}$. Show Answer Correct Answer: B) I$^{A}$ I$^{o}$ and I$^{B}$ I$^{O}$. 13. Select the incorrect statement with regard to haemophilia. A) It is a dominant disease. B) A single protein involved in the clotting of blood is affected. C) It is a sex-linked disease. D) It is a recessive disease. Show Answer Correct Answer: A) It is a dominant disease. 14. What is the law of dominance in Mendel's laws of inheritance? A) The dominant allele is always expressed over the recessive allele. B) The recessive allele is always expressed over the dominant allele. C) Both alleles are expressed equally. D) There is no dominance in alleles. Show Answer Correct Answer: A) The dominant allele is always expressed over the recessive allele. 15. The gene disorder phenylketonuria is an example for A) Multiple allelism. B) Polygenic inheritance. C) Multiple factor. D) Pleiotropy. Show Answer Correct Answer: D) Pleiotropy. 16. If the D allele is completely dominant over the d allele, what percentage of the offspring will have the dominant phenotype when Dd and Dd individuals mate? A) 25%. B) 50%. C) 75%. D) 100%. Show Answer Correct Answer: C) 75%. 17. What theory was coined by Sutton and Boveri? A) Genetic theory of inheritance. B) Chromosomal theory of inheritance. C) Universal theory of recombination. D) Chromosomal theory of genetics. Show Answer Correct Answer: B) Chromosomal theory of inheritance. 18. In XX and XY type of sex-determination A) Males are heterogametic. B) Females are isogametic. C) Both (a) and (b). D) None of the option is correct. Show Answer Correct Answer: A) Males are heterogametic. 19. Which of Mendel's laws states that alleles are separated during meiosis? 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. 20. Which one of the following traits studied by Mendel, was recessive? A) Round seed shape. B) Axial flower position. C) Green seed colour. D) Green pod colour. Show Answer Correct Answer: C) Green seed colour. 21. A tall true breeding plant is crossed with a dwarf true breeding plant. When the F1 plants were selfed the resulting genotypes were in the ratio of A) 1:2:1::tall heterozygous:tall homozygous:dwarf. B) 3:1::tall:dwarf. C) 3:1::dwarf:tall. D) 1:2:1::tall homozygous:tall heterozygous:dwarf. Show Answer Correct Answer: D) 1:2:1::tall homozygous:tall heterozygous:dwarf. 22. Linkage is A) Stronger between genes located far away from each other upon the chromosome. B) Stronger between genes located close together upon the chromosome. C) Strength of linkage is not dependent upon the distance between the genes. D) It depends upon the nature of the concerned genes. Show Answer Correct Answer: B) Stronger between genes located close together upon the chromosome. 23. In keeping with the law of independent assortment what is actually assorted? A) Different genes on the same chromosome. B) Centromeres. C) Non homologous chromosomes. D) Heterologous chromosomes. Show Answer Correct Answer: C) Non homologous chromosomes. 24. A zygote contains A) Both alleles of a gene. B) Half alleles of a gene. C) One allele of a gene. D) Double alleles of a gene. Show Answer Correct Answer: A) Both alleles of a gene. 25. Which of the following pairs is wrongly matched? A) Starch synthesis in pea:Multiple alleles. B) ABO blood grouping:Co-dominance. C) XO type sex determination:Grasshopper. D) T.H. Morgan:Linkage. Show Answer Correct Answer: A) Starch synthesis in pea:Multiple alleles. ← 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 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