Principles of Inheritance and Variation MCQ Questions & Answers in Botany

41. Dinosaurs disappeared during

A Jurassic

B Triassic

C Creataceous

D Permian

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42. What is the effect of sexual reproduction

A Offspring is weak

B Offspring is like the parent

C Offspring is more vigorous

D Offspring is diseased

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43. Organs which have the same fundamental structure but are different in function are called

A Vestigial organs

B Homologous organs

C Analogous organs

D Homoplastic organs

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44. Mendel obtained wrinkled seeds in pea due to deposition of sugars instead of starch. It was due to which enzyme

A Amylase

B Invertase

C Diastase

D Absence of starch branching enzyme

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45. A woman with two genes for haemophilia and a gene for colour blindness on one of the $$'X'$$ chromosomes marries a normal man. How will the progeny be

A haemophilic and colour-blind daughters

B 50% haemophilic colour-blind sons and 50% haemophilic sons

C 50% haemophilic daughters and 50% colour-blind daughters

D All sons and daughters haemophilic and colour-blind

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46. De Vires gave his mutation theory on organic evolution while working on

A Oenothera lamarckiana

B Drosophila meianogaster

C Pisum sativum

D Althea rosea

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47. Which one of the following is commonly used in transfer of foreign DNA into crop plants

A Penicillium expansum

B Trichoderma harzianum

C Meloidogyme incognita

D Agrobacterium tumefaciens

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48. An inherited character and its detectable variant is termed as

A Unit factor

B Trait

C Genetic profile

D Genotypic character

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49. Who explained the operon model for the first time

A Francois Jacob

B Jacques Monod

C Francois Jacob and Jacques Monod

D Beadle and Tatum

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50. Mendel did not include in his laws

A Segregation

B Dominance

C Purity of gametes

D Linkage

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41. Dinosaurs disappeared during

42. What is the effect of sexual reproduction

43. Organs which have the same fundamental structure but are different in function are called

44. Mendel obtained wrinkled seeds in pea due to deposition of sugars instead of starch. It was due to which enzyme

45. A woman with two genes for haemophilia and a gene for colour blindness on one of the $$'X'$$ chromosomes marries a normal man. How will the progeny be

46. De Vires gave his mutation theory on organic evolution while working on

47. Which one of the following is commonly used in transfer of foreign DNA into crop plants

48. An inherited character and its detectable variant is termed as

49. Who explained the operon model for the first time

50. Mendel did not include in his laws

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