Selective breeding Quiz
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5 questions, one answer each
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1. What is the first step of selective breeding?
- A. Cross-pollinate the plants
- B. Insert a gene into a plasmid
- C. Breed from every offspring
- D. Decide which characteristic is wanted
2. Which feature have dairy cattle been bred for?
- A. Disease-resistant seeds
- B. Beta-carotene in their milk
- C. High milk yield
- D. Bigger leaves
3. What is the main risk of inbreeding?
- A. More genetic variation
- B. Faster breeding
- C. Harmful recessive alleles are more likely to be inherited from both parents
- D. Larger offspring
4. Which statement describes natural selection?
- A. Humans choose the parents
- B. The environment decides which organisms survive and breed
- C. Genes are inserted into the organism
- D. Only clones are produced
5. Why is growing only one variety of a crop risky?
- A. It takes more water
- B. One disease could destroy the whole crop because there is little genetic variation
- C. It cannot be harvested
- D. It always gives a lower yield