Tag: biotechnology

Questions Related to biotechnology

From which technique, new and better varieties of crop plants are formed

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Selection

  2. Hybridisation

  3. Grafting

  4. Hybridisation followed by selection.

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Correct Option: D

During hybridisation, offspring with hybrid vigour superior to both parents are self pollinated for a few successive generations to .............

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Retain their parental characters

  2. Remove their parental characters

  3. Get homozygosity

  4. Segregate characters.

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Correct Option: C

During somatic hybridisation in plants

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Somaclones are produced in large numbers

  2. Apical meristems are cultured to get virus-free plant

  3. Cell walls and middle lamella are digested before fusing the cells

  4. Crop plants with higher levels of vitamins, proteins, and minerals are hybridised.

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Correct Option: C

For hybridisation, which part is removed from bisexual flowers

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Stigma

  2. Stigma and style

  3. Anthers

  4. Ovary.

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Correct Option: C

Consider the following statements: Hybrid plants can show.
a. Sterility
b. Mosaicism
c. Crossing over
d. Vigour
e. Homozygosis
Which of the statements are correct?

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. $2, 3$ and $5$

  2. $2, 4$ and $5$

  3. $1, 2$ and $4$

  4. $1, 3$ and $4$

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Correct Option: A

Plant breeders are interested in apomixes because it __________________.

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Improves seed-set

  2. Shortens the life cycle

  3. Yields clonal progeny

  4. None of these

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Correct Option: A

A breeder crossed a pure bred all plant having white flowers to a pure bred short plant having blue flowers. He obtained $202\ F _{1}$ progeny and found that they are all tall having white flowers. Upon selfing there $F _{1}$ plants, he obtained a progeny of $2160$ plants. Approximately, how many of these are likely to be short and having blue flowers?

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. $1215$

  2. $405$

  3. $540$

  4. $135$

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Correct Option: D

Process of bringing wild species of plants under cultivation to suit human needs is called

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. selection

  2. hybridization

  3. domestication

  4. cultivation

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Correct Option: C
Explanation:
Domestication is the process where wild plant and animal species are adapted into the cultivation area for human use.
The species that are domesticated are used for food, work, medicine and various other uses.
Once the wild species are being domesticated they need to be raised and cared for by humans.
So, the correct option is 'domestication'

The main objective of plant breeding is to develop new crop varieties superior in all aspects as compared to the existing types.

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. True

  2. False

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Correct Option: A
Explanation:

Plant breeding is a method of altering the genetic pattern of plants to increase their value and utility for human welfare. It is a purposeful manipulation of plants to create desired plant types that are better suited for cultivation, give better yield and are disease resistant. The main aim of plant breeding is to obtain higher yield, improved quality, resistance to pathogens and pests, etc.

So the given statement is true.

Which of the following variety of rice has been produced by the hybridisation of Oryza japonica and O. indices?

botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Jagannath

  2. Aruna

  3. ADT-37

  4. Reimei

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Correct Option: C
Explanation:

ADT-37 is an inter varietal cross between Oryza Japonica and Oryza Indices.