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Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 4 (60 MCQs)

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1. In a certain taxon of insects some have 17 chromosomes and the others have 18 chromosomes. The 17 and 18 chromosome bearing organisms are
2. Mendel did not propose the theory of-
3. Why is haemophilia a disease that is more commonly seen in males?
4. Chromosomal theory of inheritance shows parallel behaviour between
5. Strength of linkage is inversely proportional to distance between
6. A heterozygous violet-flowered pea plant is crossed to another homozygous violet-flowered pea plant. What percent of the progeny will have the recessive trait, i.e., white?
7. Which one from those given below is the period of Mendel's hybridisation experiments?
8. 2 IDENTICAL alleles for the same trait. John has 2 genes for brown eyes so he is .....
9. Andalusian fowls have two pure forms-black and white. If black forms (BB) and white forms (WW) are crossed, F, individuals appear blue coloured (BW), due to incomplete dominance. Which of the following would be an outcome of a cross between black form and blue form?
10. Ratio of complementary genes is
11. Column A ..... Column BI.Gregor Mendel ..... A.Chromosomal theory of InheritanceII.Sutton and Boveri ..... B.Law of InheritanceIII.Henking ..... C.Mendelian disorderIV.Thalassemia ..... D.Discovered x-bodyThe correct match is-
12. Thalassemia in humans
13. According to Law of Segregation, what property of gametes/alleles is maintained during gametogenesis
14. .... is a type of trait whose phenotype is influenced by more than one gene.
15. Which of the following is suitable for experiment on linkage?
16. Haplodiploidy technique of sex determination facilitates
17. The non-disjunction of 21st pair of autosomal chromosome leads to
18. Who is recognized as the Father and Founder of genetics?
19. Heterozygous tall and violet flowered plant (Tt Ww) was selfed, and a total of 1000 seeds were collected. The number of seeds with Ttww genotype will be
20. If 75% of the offspring show dominant character, then the parents are
21. A man whose father was color blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind?
22. The inheritance pattern of a gene over generations among humans is studied by the pedigree analysis. Character studied in the pedigree analysis is equivalent to
23. A colourblind man (X$^{c}$Y) marries a woman who is carrier for haemophilia (XX$^{h}$). Which of the following is true for their progenies?
24. The allele which is unable to express its effect in the presence of another is called
25. A tall red-flowered pea plant after crossing with a dwarf white-flowered plant yields only tall red-flowered plants. A test cross shall give a ratio of
26. When dominant and recessive alleles express itself together it is called
27. Which of the following is not a hereditary disease?
28. Mendelian disorders are mainly determined by
29. Suppose that in sheep, a dominant allele B produces black hair and a recessive allele b produces white hair. If you saw a black sheep, you'll be able to identify
30. Which one is not Non-Mendelian inheritance-
31. IN Mirabilis jalapa WHEN THE PLANT WITH RED FLOWER CROSSED WITH THAT OF WHITE FLOWER F1 HYBRIDS SHOW FLOWERS WITH PINK COLOUR, THIS IS DUE TO
32. In sickle cell anaemia, glutamic acid is replaced by valine. Which one of the following triplets codes for valine
33. In a cross between negro and albino skin colour of humans showing polygenic inheritance, the phenotypic ratio in F$_{2}$ generation will be
34. Chromosome theory of inheritance is proposed on the basis that
35. What is the genotype of an individual?
36. A gamete carries only one factor of a character. Above statement justifies
37. Male XX and female XY sometime occur due to
38. Mendel took the pollen from one pea plant and placed it onto the pistil of a second pea plants. This is .....
39. There are 3 genes a, B, C. Percentage of crossing over between a and b is 20%, B and c is 28% an a and c is 8%. What is the sequence of gene on chromosome
40. ABO blood groups in humans are controlled by the gene I. It has three alleles-I$^{A, }$I$^{B }$and i. since there are three different alleles, six different genotypes are posiible. How many phenotypes can occur?
41. Among the seven pairs of contrasting traits in pea plant as studied by mendel, the number of traits related to flower, pod and seed respectively were
42. Mendel's experimental material was
43. Alfred sturtevant work is-
44. In mice, black coat colour (allele B) is dominant to brown coat colour (allele b). The offspring of a cross between a black mouse (BB) and a brown mouse (bb) were allowed to interbreed. What percentage of the progeny would have black coats?
45. A simple cut in an affected individual result in non-stop bleeding. The affected individual is diagnosed with
46. A recessive allele is expressed in
47. Mutation may result in
48. A man marries a woman and both do not show any apparent traits of inherited disease. Five sons and two daughters are born, and three of their sons suffer from a disease. However, none of the daughters is affected. The following mode of inheritance for the disease is
49. Conditions of karyotype 2n+ ..... 1 and 2n + ..... 2 are called
50. Which of these are test cross observations?
51. Theoretically, the modified allele could be responsible for the production of I. the normal / less efficient enzymeII. a non-functional enzymeIII. no enzyme at all
52. Phenotypic and genotypic ratio is similar in case of
53. On crossing pure breeding pea plant consisting of axially placed violet colour flower with terminally placed white colour flower, 480 plants were obtained in F2 generation. What will be the number of plants considered as parental progeny in this F2 generation?
54. ..... is called null allele
55. I$^{A }$allele produces ..... enzyme
56. Genes on same chromosome can be
57. What can be the blood group of offspring when both parents have AB blood group?
58. Pleiotropic genes have
59. The physical characteristics of an organism that is expressed. John has blue eyes and brown hair.
60. Z Z / ZW type of sex determination is seen in:
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