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Strategies for Enhancement in Food Production · Question 12

NEET (UG) 2019MCQMedium📈 Topic in 25% papers+4−1
1

Select the incorrect statement.

  1. Inbreeding selects harmful recessive genes that reduce fertility and productivity.
  2. Inbreeding helps in accumulation of superior genes and elimination of undesirable genes.
  3. Inbreeding increases homozygosity.
  4. Inbreeding is essential to evolve purelines in any animal.

Answer

(1) Inbreeding selects harmful recessive genes that reduce fertility and productivity.

Solution

As per NCERT, inbreeding is mating of more closely related individuals within the same breed for 4–6 generations.

It increases homozygosity, so it is necessary to evolve a pureline in any animal — statements (3) and (4) are correct.

It exposes harmful recessive genes, which are then eliminated by selection, and it helps in accumulation of superior genes — statement (2) is correct.

Inbreeding does not 'select' harmful recessive genes; it exposes them so that they can be eliminated. (Continued inbreeding reduces fertility and productivity — inbreeding depression.)

Answer: (1)

Out of syllabusNEET (UG) 2019

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2

Homozygous purelines in cattle can be obtained by :

  1. mating of related individuals of same breed
  2. mating of individuals of different species
  3. mating of individuals of different breed
  4. mating of unrelated individuals of same breed
Out of syllabusNEET 2017
3

Interspecific hybridisation is the mating of

  1. animals within same breed without having common ancestors
  2. superior males and females of different breeds
  3. more closely related individuals within same breed for 4-6 generations
  4. two different related species
Out of syllabusNEET 2016 (Phase 2)
4

Among the following edible fishes, which one is a marine fish having rich source of omega-3 fatty acids ?

  1. Mangur
  2. Mystus
  3. Mackerel
  4. Mrigala
Out of syllabusNEET 2016 (Phase 2)
5

Outbreeding is an important strategy of animal husbandry because it :

  1. helps in accumulation of superior genes.
  2. is useful in overcoming inbreeding depression.
  3. is useful in producing purelines of animals.
  4. exposes harmful recessive genes that are eliminated by selection.
Out of syllabusAIPMT 2015
6

A protoplast is a cell -

  1. undergoing division
  2. without plasma membrane
  3. without nucleus
  4. without cell wall
Out of syllabusAIPMT 2015
7

A technique of micropropagation is

  1. somatic embryogenesis
  2. embryo rescue
  3. protoplast fusion
  4. somatic hybridisation
Out of syllabusAIPMT 2015 (Cancelled)
8

Which of the following enhances or induces fusion of protoplasts ?

  1. Sodium chloride and potassium chloride
  2. IAA and kinetin
  3. Polyethylene glycol and sodium nitrate
  4. IAA and gibberellins
Out of syllabusAIPMT 2015 (Cancelled)
9

To obtain virus-free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken ?

  1. Epidermis only
  2. Palisade parenchyma
  3. Both apical and axillary meristems
  4. Apical meristem only
AIPMT 2014
10

In vitro clonal propagation in plants is characterized by :

  1. Microscopy
  2. Northern blotting
  3. Electrophoresis and HPLC
  4. PCR and RAPD
Out of syllabusAIPMT 2014
11

In plant breeding programmes, the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called :

  1. germplasm collection
  2. evaluation and selection of parents
  3. selection of superior recombinants
  4. cross-hybridisation among the selected parents
Out of syllabusNEET 2013

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All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)