Genetics Principles of Inheritance and Variation PDF

 Sanjivani Institute of Biology PINCIPLES OF INHERITANCE AND VARIATION (GENETICS) 1. Genes which code for a pair of contrasting traits are known as (a) Jumping genes (b) Alleles (c) Spilit genes (d) N....

 Sanjivani Institute of Biology PINCIPLES OF INHERITANCE AND VARIATION (GENETICS) 1. Genes which code for a pair of contrasting traits are known as (a) Jumping genes (b) Alleles (c) Spilit genes (d) N.O.T  Sanjivani Institute of Biology 2. The phenotypic ratio for a dihybrid cross is (a) 1:2:1 (b) 3:1 (c) 9:4 (d) 9:3:3:1 3. Which genetic disease is caused by trisomy of 21st chromosome? (a) Turner’s Syndrome (b) Down’s syndrome (c) Haemophilia (d) Klinefelter’s Syndrome 4. What is chromosomal disorder ?  Sanjivani Institute of Biology 5. With the help of a suitable monohybrid cross, explain law of dominance in brief. 6. Which of the following is a sex linked disease? (a) Down's syndrome (b) Phenylketonuria (c) Sickle cell anaemia (d) Haemophilia  Sanjivani Institute of Biology 7. A person having IA IB genotype would show the blood group AB. This is because of (a) Codominance (b) Incomplete dominance (c) Dominance (d) Chromosomal disorder Ans. 8. Which Mandelian principle is also known as 'Law of Purity of Gametes' ? (a) Law of dominance (b) Law of segregation (c) Law of independent assortment (d) Chromosomal theory of inheritance 9. The phenotypic ratio of incomplete dominance is (a) 9:3:3:1 (b) 3:1 (c) 1:2:1 (d) 9:4:3  Sanjivani Institute of Biology 10. Chromosomal theory of inheritance was proposed by (a) Mendel (b)T. H.Morgan (C) Sutton and Boveri (d) Johansen 11. The number of autosomes in a normal human cell is. (a) 44 (b) 45 (c) 46 (d) 4K 12. Test cross in a plant can be defined as a cross. (a) Between F1 , hybrid with recessive genotype. (b) Between two dominant traits. (c) Between two recessive traits. (d) Between two F1 hybrids  Sanjivani Institute of Biology 13. The ratio of mono hybrid cross is- (a) 9:3:3:1 (b) 3:1 phenotypic ratio (c) 1:2:1 genotypic ratio (d) 2:1 14. Define Test cross and draw diagram. 15. The ratio for a dihybrid cross is (a) 3:1 (b) 9:3:3:1 (c) 9:7 (d) 12:3:1  Sanjivani Institute of Biology 16. Mendel dihybrid ratio is- (a) 2:1 (b) 3:1 (c) 9:3:3:1 (d) 9:7 17. The chromosomal type of sex-determination in human being is- (a) XX-X0 (b) XX – XY (c) ZZ-ZO (d) ZZ-ZW 18. Mendel monohybrid ratio is- (a) 2:1 (b) 3:1 (c) 9:3:3:1 (d) 9:7  Sanjivani Institute of Biology 19. How many pairs of contrasting characters were studied by Mendel? (a) 5 pairs (b) 6 pairs (c) 7 pairs (d) 8 pairs 20. Define cross over ? 21. Name two sex linked diseases in human beings. 22. How many types of blood groups are found in human being? Which blood group is Universal donor?  Sanjivani Institute of Biology 23. How does the sex determination take place in human ? 24. What is test cross? Show phenotypic ratio 1:1 in a Monohybrid test cross through punnet square. 25. How will you differentiate between complete dominance and incomplete dominance? Explain them with example  Sanjivani Institute of Biology 26. Describe the inheritance pattern of blood group in human beings. 27. A cross between a hybrid and recessive pattern is called (a) Back cross (b) Test cross (C) Monohybrid cross (d) Dihybrid cross 28. Complete linkage is observed in- (a) Drosophilla (b) Snake (c) Bird (d) Man 29. The two contrasting aspects of the same character used in Mendel's experiment are called- (a) Gene (b) Phenotype (c) Genotype (d) Allelomorph  Sanjivani Institute of Biology 30. Mendel's principle was rediscovered by- (a) Hugo de Vries (b) E. Von Tschermak (c) Correns (d) All of them 31. When a red skinned animal is crossed with white skinned animal then Roan coloured animal is produced in F1 generation. This shows- (a) Co-dominance (b) Complete dominance (c) Incomplete dominance (d) Linkage 32. What is difference between a monohybrid and a dihybrid cross?  Sanjivani Institute of Biology 33. Describe sex linked inheritance with the help of an example. 34. When only one pair of contrasting traits are considered in a cross, it is called - (a) Monohybrid cross (b) Dihybrid cross (c) Single cross (d) Double cross 35. The chromosomal theory of inheritance was proved doing experiment on fruit fly (Drosophila melangaster) by (a) Mendel (b) Sutton and Boveri (c) Thomas Hunt Morgan (d) Henking  Sanjivani Institute of Biology 36. Who coined the term “Mutation” (a) Morgan (b) Hugo de vries (c) Alexander Flemming (d) Dixon and jolly 37. Genes which code for a pair of contrasting traits are known as- (a) Heterozygous (b) Alleles (c) Homozygous (d) Recessive 38. What is test cross? Show phenotypic ratio 1:1 in a Monohybrid test cross through punnet square.  Sanjivani Institute of Biology 39. What is hemophilia? Write it’s sex linked inheritance pattern. 40. Explain mendel’s law of segregation through suitable example.  Sanjivani Institute of Biology 41. Explain mendel’s monohybrid cross. Mention the phenotype and genotype ratios obtained. 42. How many types of blood groups are found in human being? Which blood group is Universal donor? 43. What is male heterogamety? Give two examples of male heterogamety.  Sanjivani Institute of Biology 44. Describe mendel’s law of segregation? 45. Write the chromosomal configuration of Klinefelter syndrome and Turner’s syndrome ?  Sanjivani Institute of Biology 46. Explain haemophilia and sickle cell anamemia. 47. If two plants (aaBB and AaBB) are crossed, what will be the genotypic ratio of the F1 generation? ( |AaBB1 : |aaBB/ | AaBB : 3aaBB) 48. Mention Mendel’s advantages in selecting the pea plant for experiements.  Sanjivani Institute of Biology 49. Which of these is sex-linked inheritence ? (a) Haemophilia (b) Diabetes ( c) Influenza (d) Tuberculosis 50. Blood of which group can be given to a patient of any blood group ? (a) O (b) A (c) B (d) AB 51. Haemophilia victims are mostly men but very rarely women are affected by this defect. Why is it so ?  Sanjivani Institute of Biology 52. Explain the chromosomal theory of inheritance. 53. Discuss the phenomenon of incomplete Dominance with example. 54. Diference between ‘aneuploidy’ and polyploidy.  Sanjivani Institute of Biology 55. What do understand by chromosomal theory of inheritance? 56. Write the number of opposite paired characters on which Mandel work? 57. How is sex determined in human ?  Sanjivani Institute of Biology 58. Write about mendel in four lines. 59. What are multiple Alleles ? Give two examples. 60. The human male never passes on the gene for hemophilia to his son. Why is it so ?  Sanjivani Institute of Biology 61. Explain the law of Dominance using monohybrid cross. 62. Name the cross where F1 indivisual is crossed with recessive one ? 63. How many pairs of contrasting characters are studied by Mendel?