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Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 3 (60 MCQs)

Quiz Instructions

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1. In keeping with the law of independent assortment what is actually assorted?
2. A zygote contains
3. Which of the following pairs is wrongly matched?
4. ABO blood group in man is controlled by
5. It is to find out the genotype of the plant showing dominant trait, the given plant is crossed with the recessive homozygote.
6. Genetic constitution of Klinifelter's syndrome
7. Are the basic unit of inheritance and located on chromosomes.
8. If there are four different types of nitrogenous bases (A, T, G and C) then how many different types of transitions and transversion are possible?
9. X and Y-chromosomes are
10. Which of the following are chromosomal disorders. I. Colour blindness II. Down's syndrome III. Phenylketonuria IV. Turner's syndrome V. Thalassaemia
11. Chromosome maps/ genetic maps were first prepared by
12. Genotypic and Phenotypic ratio of incomplete dominance is-
13. Study the following statements on Sex Linked inheritance. Find the incorrect statement.
14. In certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.Which of the following will result when plant YyRr is self-pollinated?
15. If a dominant allele is present, the trait will always appear in the organism.
16. Monohybrid test cross ratio is
17. Read the given statements.(i) Incomplete or mosaic inheritance is an example of pre-Mendelian concept of blending inheritance.(ii) Test cross is a special type of back cross.(iii) Chromosomal aberrations are commonly observed in cancer cells.(iv) Thalassemia is a Mendelian disorder.Which of the above statements are correct?
18. If a hybrid expresses a character, is it called .....
19. Mendel's law of Independent assortment does not hold true for the genes that are located closely on
20. Identify the Mendel's Law that states that though the parents contain both the alleles, during gamete formation alleles will separate and each gamete will get only one allele.
21. Statement I:Combination of gametes are theoretically represented in a square tabular form known as Punnet square.Statement II:Form of genes which code for a pair of contrasting traits are known as alleles.
22. A pleiogropic gene
23. Find out the percentage of gametes with tr in ttRr
24. Rate of mutation is affected by
25. From the following postulation of Mendel, which one expresses the 2nd law of Mendel?
26. What map unit (Centimorgan) is adopted in the construction of genetic maps?
27. Ocassionally a single gene may express more than one effect. This phenomenon is called
28. What will be possible blood group in children from the parents with B and AB blood groups?
29. Which condition depict trisomy condition?
30. Which of the following is sex linked disorder
31. Multiple alleles are present
32. WHEN A MAN WITH BLOOD A GETS MARRIED TO A WOMAN WITH BLOOD GROUP B, THEN THEIR FIRST CHILD HAS BLOOD GROUP O.FIND OUT PROBABILITY OF OTHER BLOOD GROUPS THEIR CHILDREN.
33. In his classic experiments on pea plants, Mendel did not use
34. If a normal visioned man marries a colour blind woman, the chances are high that their sons will be .....
35. A family of four children have colorblind father and a carrier mother. What will be the number of normal sons?
36. According to Mendel's principle of segregation, gametes always receive
37. IF A PEA PLANT WITH GENOTYPE RRYy IS CROSSED WITH ANOTHER PEA PLANT WITH GENOTYPE RrYy THEN FIND OUT THE PHENOTYPIC RATIO OF F1 HYBRIDS.
38. Two allelic genes are present on
39. Down's Syndrome is due to-
40. Monosomic (2N-1) is a condition of Aneuploidy which is seen in
41. In pea plant, a heterozygote for axial flower was outcrossed. In what ratio genotype would segregate?
42. Where are the genes for cytoplasmic male sterility in plants located?
43. Recessive gene for haemophilia lacks
44. Generation of non-parental gene combinations is termed as
45. The fourth blood group was discovered in the year ..... by Castelle and Sturli
46. In pea plant, white colour flowers appear due to presence of
47. Law of Segregation
48. The geneof sickle cell anemia is inherited by
49. . In this disease, there occurs a failure of chloride ion transport mechanism in cell surface membrane of epithelial cells; sweat of the patient conditions very high level of Na$^{+}$ and Cl$^{-}$ ions. This disease is
50. In the F$_{2}$ generation of a mendelian dihybrid cross the number of phenotypes and genotypes are
51. Why is hemophilia a disease that is more commonly seen in males?
52. When a single gene influences more than one trait it is called
53. Read the given statements and select the correct option. Statement 1:Test cross is used to determine an unknown genotype within one breeding generation.Statement 2:Test cross is a cross between F$_{1 }$hybrid and dominant parent.
54. If two genes lie very close to each other, it will show
55. A fruit fly has two genes for eye color, but each of its sperm cells has only one. This illustrates
56. A child with mother of A group and father of AB group, will not have the following blood group-
57. Number of pair(s) of allosome present in Humans is/are
58. What will be the number of linkage groups in a cell having 2n = 20?
59. A normal-visioned man whose father was colourblind, marries a woman whose father was also colourblind. They have their first child as a daughter. What are the chances that this child would be colourblind?
60. A cross where gametes from parental generation is reversed is called
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