Home
Class 12
BIOLOGY
Read the following statements :- (1) G...

Read the following statements :-
(1) Genetic Variability is the root of all breeding programs.
(2) Induced mutations are useful when desired alleles are absent in germplasm.
(3) Conventional breeding is not constrained by availability of limited number of genes.
(4) Other breeding methods that are used selection amongst somaclonal variants and genetic engineering.
How many of the above statements are correct ?

A

1

B

2

C

3

D

4

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • BIOLOGY AT A GLANCE

    ALLEN|Exercise Microbes IN Human Welfare And Bio - Technology|32 Videos

  • BIOLOGY AT A GLANCE

    ALLEN|Exercise Ecology|62 Videos

  • BIOLOGY AT A GLANCE

    ALLEN|Exercise Molecular basis of inheritance|46 Videos

  • BIODIVERSITY AND CONSERVATION

    ALLEN|Exercise S|18 Videos

  • BIOLOGY AT A GLANCE (ZOOLOGY )

    ALLEN|Exercise EXERCISE|207 Videos

Similar Questions

Explore conceptually related problems

Read the following statements :- (1) In bryophytes true root, stem and leaves are absent. (2) In Cycas, male cones and megasporophylls are borne on different trees. (3) Stem of Cycas is branched and of Pinus and Cedrus is unbranched. (4) In gymnosperms, generally tap roots are found. Select the correct statements:

Read the following statements and select the correct ones. A. M.S. Swaminathan is considered as father of white revolution. B. Genetic variability is the root of any breeding programme. C. cross hybridisation is a very time consuming and tedious process.

Read the following four statements (1-4) (1 ) The second heart sound is DUB, which is associated with the closure of bicuspid and tricuspid valves . (2) The duration between consecutive second and first heart sound is 0.5 second in a cardiac cycle . (3) The heartbeat of a human increase when the adrenaline hormone in injected into it. (4) The atrial systole in a cardiac cycle increase the flow of blood into the respective ventricle by about 70% . How many of the above statements are incorrect ?

Read following statements (1-4). 1. In transcriptoin, adenine pairs with uracil. 2. Regulation of lac operon by repressor is referred to as positive regulation. 3. The human genome has approximately 50,000 genes. 4. Haemophilia is a sex - linked recessive disease. How many of the above statements are right ?

Read the following statements carefully : (1) Gap junction facilitates the cells to communicate with each other by connecting the cytoplasm of two adjoining cells to cytoplasm of two adjoining cells . (2) Adhering junctions help to stop substances from leaking across a tissue . (3) compound epithelium covers the dry surface of the skin only and provides protection against chemical and mechanical stresses. (4) most of the bones in vertebrates embryos are replaced by cartilages in adults. How many of the above statement is/are correct ?

Read the following statements : S_(1) : An object shall weigh more at pole than at equator when weighed by using a physical balance. S_(2) : It shall weigh the same at pole and equator when weighed by using a physical balance. S_(3) : It shall weigh the same at pole and equator when weighed by using a spring balance. S_(4) : It shall weigh more at the pole than at equator when weighed using a spring balance. Which of the above statements is/are correct ?

Read the given statements and select the correct option. Statement 1 : The cloning vector is required to have very few, preferably single, recongnition sites for the commonly used restriction enzymes. Statement 2: Presence of more than one recongnition sites within a cloning vector will generate several fragments, which will complicate the process of gene cloining. 1) Both statements 1 and 2 are correct 2) statement 1 is correct but statement 2 is incorrect 3) statement 1 is incorrect but statement 2 is correct 4) None of the above

Read the following statements regarding Mendelian inheritance and choose the correct option 1. Mendel's experiments had samll sample size which gave greater credibility to the data 2. A true breeding line shows a stable trait inheritance and expression for several generations 3. In a dissimilar pair of factors, one member of the pair dominates over the other 4. A recessive parental trait is expressed only in its heterozygous condition 5. Two alleles of a gene are located on homologous sites on homologus chromosomes

Read the given statements and select the correct option Statement 1 : Test cross is used to determine an unknown genotype within one breeding generation Statement 2 : Test cross is a cross between F_(1) hybrid and dominant parent.

Match the following: Column I Column II A Mutation breeding 1 Laborious and expensive process to obtain gene variation B Selection 2 Hybrid vigour can be maintained for several generations C Hybridisation 3 Simplest and easiest method of plant improvement D Introduction 4 Oldest breeding method 5 Quick method to obtain gene variation

ALLEN-BIOLOGY AT A GLANCE-Domestication of plant
  1. Enzyme used for obtaining protoplast from isolated single cell of plan...

    Text Solution

    |

  2. Correctly match the column-I with column-II.

    Text Solution

    |

  3. Which of the following statement is correct regarding the improved va...

    Text Solution

    |

  4. Which of the following is correct match ?

    Text Solution

    |

  5. Which of the following is incorrect match :-

    Text Solution

    |

  6. Match the following columns :-

    Text Solution

    |

  7. Match the following columns :-

    Text Solution

    |

  8. Find the correct statements (A) Atlas-66 is biofortified variety of...

    Text Solution

    |

  9. Abelmoschus esculentus is high yeilding cultivated of bhindi, which is...

    Text Solution

    |

  10. Smooth leaved and nectarless cotton varieties do not attract

    Text Solution

    |

  11. Read the following statements :- (1) Genetic Variability is the root...

    Text Solution

    |

  12. Read of the following statements:- (a) Insect resistance in crop pla...

    Text Solution

    |

  13. Choose incorrect statement:-

    Text Solution

    |

  14. Which of the following is not an example of single cell protein ?

    Text Solution

    |

  15. Match the columns.

    Text Solution

    |

  16. Given below is the process of somatic hybridisation indentify A, B, C,...

    Text Solution

    |

  17. In mung bean, resistance to yellow mosaic virus and powdery mildew wer...

    Text Solution

    |

  18. Choose incorrect columns :-

    Text Solution

    |

  19. Which one of the following is not a benefit of haploid culture ?

    Text Solution

    |

  20. Which one of following hybrid variety of crop not developed in India ?

    Text Solution

    |