MCQ on Plant Breeding | Backcross breeding and Mutation breeding

1. Triticale has been evolved by hybridization between

A) Rice and Maize

B) Wheat and rice

C) Wheat and rye

D) Ragi and Maize

MCQ on Plant Breeding | Backcross breeding and Mutation breeding

2. Which is the hexaploid species of Wheat?

A) Triticum monococcum

B) Triticum durum

C) Triticum aestivum

D) Triticum turgidum


3. Elite plants of a population are selected at the time of harvest and their seeds are bulked for sowing in the next season is termed as

A) Pure line selection

B) Mass selection

C) Linebreeding

D) Recurrent selection


4. Emasculation in coconut trees is done by

A) Removing anthers from the male flowers

B) Removing anthers from the bisexual flowers

C) Removing the male flowers from the inflorescence

D) Removing anthers from the male flowers before anthesis


5. Heterosis results from

A) Harmful effects of recessive alleles and heterozygosity

B) Homozygosity

C) Heterozygosity

D) Heterozygosity and masking of harmful effects of recessive alleles


6. Production of a double-cross hybrid involves

A) Two inbreds

B) Four inbreds

C) Six inbreds

D) Three inbreds


7. Which of the following crops are sterile due to triploid chromosome number?

I. Banana II. Citrus III. Watermelon IV. Grapes

a) I and II

b) I and III

c) II and IV

d) III and IV


8. If the somatic chromosome number for an organism is 2n = 16, the hexaploid number would be

A) 16

B) 32

C) 48

D) 64


9. ‘Gamma garden’ is used for

A) Growing plantlets produced by tissue culture

B) Eradicating pathogen from infected plants

C) Growing genetically engineered plants on trial basis

D) Mutation breeding for crop improvement.


10. Which phrase is not true about backcross breeding?

A) It is a practice that has been used by plant breeders for decades

B) Backcross breeding is repeated until the offspring has 99+% elite genes and the transgene

C) Backcross breeding is a new technique developed for genetically engineered plants

D) Backcross breeding is often used to reduce yield drag

  Learn more: Quiz on Plant Breeding 

Answers:

1. C) Wheat and rye

2. C) Triticum aestivum

3. B) Mass selection

4. C) Removing the male flowers from the inflorescencee

5. D) Heterozygosity and masking of harmful effects of recessive alleles

6. B) Four inbreds

7. b) I and III

8. C) 48

9.D) Mutation breeding for crop improvement.

10.C) Backcross breeding is a new technique developed for genetically engineered plants

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