Principles of Inheritance and Variation MCQ Questions & Answers in Botany

51. Jurassic period of the Mesozoic era is characterized by

A Gymosperms are dominant plants and first birds apper

B Radiation of reptiles and origin of mammal like

C Dinosaurs become extinct and Angiosperms appear

D Flowering plants and first dinosaurs apper

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52. When flowers are unisexual then emasculation is done in

A Female

B Male

C A and B both

D None of the above

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53. Which of the following is the example of pleiotropicgene

A Haemophilia

B Thalaessemea

C Sickle cell anaemia

D Colour blindness

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54. If hybrid red flowered plants of pea are crossed back to pure red flowered parent, the progeny will show

A All red flowered plants

B White flowered plants

C 50% red and 50% white flowered plants

D 3 Red : 1 white flowered plants

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55. Which is not correctly matched

A Agrobacterium => Ti-plasmid

B Cosmid => Vector DNA

C Rhizobium => Asymbiotic N₂ -fixer

D Albinism => Autosomal recessive gene

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56. In female Drosophila the linked gene exhibit recombination during meiosis of gamete formation, but such a recombination does not occur during the formation of sperm in male Drosophila

A Male Drosophila is sterile

B Male Drosophila is parthenogenetic male

C No crossing over occur in male Drosophila

D Male Drosophila is haploid

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57. Study the pedigree chart given below

A Inheritance of a recessive sex-linked disease like haemophilia

B Inheritance of a sex-lined inborn errbr of metabolism like phenylketonuria

C Inheritance of a condition like phenylketonuria as an autosomal recessive trait

D The pedigree chart is wrong as this is not possible

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58. How many different types of gametes can be formedby Fj progeny, resulting from the following crossAA BB CC x aa bb cc

A 3

B 8

C 27

D 64

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59. In polygenic inheritance trait which controlled by three pairs of genes. Two individuals which are heterozygous for three alleles, crossed each other. Such type of cross produced phenotypic ratio in what ratio

A 1 : 2 : 1

B 9 : 3 : 3 : 1

C 1 : 4 : 6 : 4 : 1

D 1 : 6 : 15 : 20 : 15 : 6 : 1

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60. Experimental verification of the chromosomal theory of inheritance was done by

A Sutton

B Boveri

C Morgan

D Mendel

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51. Jurassic period of the Mesozoic era is characterized by

52. When flowers are unisexual then emasculation is done in

53. Which of the following is the example of pleiotropicgene

54. If hybrid red flowered plants of pea are crossed back to pure red flowered parent, the progeny will show

55. Which is not correctly matched

56. In female Drosophila the linked gene exhibit recombination during meiosis of gamete formation, but such a recombination does not occur during the formation of sperm in male Drosophila

57. Study the pedigree chart given below

58. How many different types of gametes can be formedby Fj progeny, resulting from the following crossAA BB CC x aa bb cc

59. In polygenic inheritance trait which controlled by three pairs of genes. Two individuals which are heterozygous for three alleles, crossed each other. Such type of cross produced phenotypic ratio in what ratio

60. Experimental verification of the chromosomal theory of inheritance was done by

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