Agriculture and Selective Breeding Quiz

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Questions and Answers

What is the primary purpose of selective breeding?

  • To increase genetic diversity
  • To produce offspring with specific traits (correct)
  • To eliminate undesirable traits completely
  • To enhance the adaptability of all species

What is a hybrid?

  • A result of natural selection without human intervention
  • A new variety produced from combining different varieties (correct)
  • A type of disease-resistant crop
  • A plant or animal that is genetically identical to its parents

Which of the following is an example of hybridisation?

  • Cultivating potatoes to increase yield
  • Combining a donkey and a horse to create a mule (correct)
  • Selecting the best tomatoes for replanting next season
  • Breeding two cows to produce a calf

What advantage does the Yakow/Dzo hybrid provide?

<p>Stronger than its parent species for mountainous terrains (D)</p> Signup and view all the answers

What is a potential disadvantage of hybridisation?

<p>Loss of certain desirable traits (B)</p> Signup and view all the answers

How does hybridisation enhance agricultural output?

<p>By improving taste and nutritional value (A)</p> Signup and view all the answers

Which statement is true regarding the livestock industry?

<p>Hybridisation can lead to improved livestock characteristics (B)</p> Signup and view all the answers

What is NOT a goal of hybridisation?

<p>Reducing genetic diversity (D)</p> Signup and view all the answers

Which of the following products is NOT derived from livestock?

<p>Cereals (A)</p> Signup and view all the answers

Which agricultural practice is commonly associated with improving plant traits through selective methods?

<p>Selective breeding (B)</p> Signup and view all the answers

Flashcards

Selective Breeding

A method of breeding plants or animals to pass on desirable traits to their offspring.

Hybridisation

Combining two different varieties of plants or animals to create a new variety (hybrid).

Hybrid

The offspring resulting from the crossing of two different varieties of plants or animals.

Economic Importance of Livestock

Livestock provide valuable products like milk, eggs, and meat, crucial for human consumption.

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Economic Importance of Crops

Plants yield essential food like cereals, vegetables, and fruits for human consumption.

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Saddle Black Pig

A pig breed selectively bred for high meat yield.

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Yakow/Dzo

A hybrid animal created from breeding yaks and cows.

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Jersey Hybrid

A crossbreed of a Jersey Bull and cow.

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Mule

A hybrid animal resulting from the crossbreeding of a horse and a donkey.

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Agriculture

Cultivating and farming crops and livestock for production.

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Study Notes

Agriculture and Livelihood

  • Agriculture is a major source of livelihood for many people
  • Food products (cereals, vegetables, fruits, spices) come from plants
  • Milk, eggs, and meat come from animals

Selective Breeding

  • Farmers breed animals and horticulturists cultivate crops with desired characteristics
  • Selective breeding is a process of breeding plants and animals to obtain specific traits
  • Examples of selective breeding include: Saddle black pigs (high meat yield)

Hybridisation

  • Combining two different varieties to produce a new variety
  • The new variety (hybrid) often has better qualities (yield, taste, nutritional value, tolerance to conditions like heat, cold, drought, disease)
  • Examples:
    • Yak X Cow = Yakow/Dzo (stronger, used as pack animals)
    • Jersey bull X Cow = Jersey (high milk yield)
    • Horse X Donkey = Mule (stronger)

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