Principles of Inheritance and Variation MCQ Questions & Answers in Botany

371. Cri-du-chat syndrome in humans is caused by the

A loss of half of the short arm of chromosome 5

B loss of half of the long arm of chromosome 5

C trisomy of $${21^{st}}$$ chromosome

D fertilization of an $$XX$$ egg by a normal Y-bearing sperm

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372. Who coined the term mutation

A Morgan

B Darwin

C DeVries

D Mendel

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373. A dihybrid ratio is

A 1:1:1:1

B 3:1

C 9:3:3:1

D 9:5:1:1

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374. Dinosaurs became extinct in the following perioe

A Permian

B Jurassic

C Cretaceous

D Triassic

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375. Genetic recombinations occur through

A Mitosis and Fertilisation

B Mitosis and Meiosis

C Meiosis and Fertilisation

D None of the above

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376. In evolution the studies can be made at molecular level. For example the protein present in the blood of man and ape are similar. The base sequence in nucleic acids amino acids sequence in protein in releted organism is alike, These are the examples which one specifically referred to in

A Convergent evolution

B Molecular analogy

C Molecular analogy

D Homoplastic appearance

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377. In the absence of mutation, migration and selectionif gene frequencies are changed in a population.This change is due to

A Polyploidy

B Hybridization

C Sampling error

D Crossing over

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378. Who isolated the first restriction endonucleases

A Temin and Baltimore

B Sanger

C Nathans and Smith

D Paul berg

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379. The concept of sudden genetic change which breeds true in an organism is visualized as

A Natural selection

B Inheritance of acquired characters

C Mutation

D Independent assortment

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380. Significance of mimicry is

A Attach (Offence)

B Protection (Defence)

C A and B both

D Isolation

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371. Cri-du-chat syndrome in humans is caused by the

372. Who coined the term mutation

373. A dihybrid ratio is

374. Dinosaurs became extinct in the following perioe

375. Genetic recombinations occur through

376. In evolution the studies can be made at molecular level. For example the protein present in the blood of man and ape are similar. The base sequence in nucleic acids amino acids sequence in protein in releted organism is alike, These are the examples which one specifically referred to in

377. In the absence of mutation, migration and selectionif gene frequencies are changed in a population.This change is due to

378. Who isolated the first restriction endonucleases

379. The concept of sudden genetic change which breeds true in an organism is visualized as

380. Significance of mimicry is

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