Selective Breeding Quiz
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5 questions, one answer each
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1. What is selective breeding also known as?
- A. Natural selection
- B. Artificial selection
- C. Genetic modification
- D. Cloning
2. Which of these best describes the process of selective breeding?
- A. Inserting a gene from one species into another
- B. Choosing organisms with desired traits and breeding them over many generations
- C. Growing genetically identical plants from tissue explants
- D. Allowing organisms to breed randomly without human input
3. A dairy farmer wants to increase the milk yield of a herd using selective breeding. What should they do first?
- A. Breed all cows in the herd together at random
- B. Identify and breed together the cows with the highest milk yield
- C. Feed all cows a higher-protein diet
- D. Import new cows from another country
4. Why is reduced genetic variation considered a disadvantage of selective breeding?
- A. It makes organisms grow more slowly
- B. It makes the population more vulnerable to disease, as fewer individuals carry resistant alleles
- C. It increases the cost of breeding programmes
- D. It prevents further selective breeding from taking place
5. A wheat breeder selects the highest-yielding plants for several generations, but after 15 generations notices some offspring show reduced disease resistance despite very high yield. Which concept best explains this outcome?
- A. Natural selection has reversed the breeding programme
- B. Selective breeding for yield has reduced overall genetic variation, including alleles for disease resistance
- C. The plants have become genetically modified
- D. The plants have undergone micropropagation