Strategies for Enhancement in Food Production · Question 11

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.

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

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

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

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.

A protoplast is a cell -

1. undergoing division
2. without plasma membrane
3. without nucleus
4. without cell wall

A technique of micropropagation is

1. somatic embryogenesis
2. embryo rescue
3. protoplast fusion
4. somatic hybridisation

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

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

In vitro clonal propagation in plants is characterized by :

1. Microscopy
2. Northern blotting
3. Electrophoresis and HPLC
4. PCR and RAPD