MYP Biology Genetic Modification Exam Style Questions
IB myp 4-5 Biology – Practice Questions- All Topics
Topic :Biotechnology-Genetic modification
Topic :Biotechnology– Weightage : 21 %
All Questions for Topic : Genetic modification,Cloning,Ethical Implications,Genome mapping and application,3D tissue and organ printing
Question
Discuss and evaluate the use of genetically modified fish farming to solve the problem of decreasing fish stocks. In your answer, you should include:
- positive and negative environmental impacts of fish farms
- positive and negative economic or social impacts of fish farms
- a suggestion of the best location for fish farms with justification
- a concluding appraisal giving your opinion.
▶️Answer/Explanation
Ans:
Question:
Explain how the researchers could discover whether a gene was needed for the bacterium to survive and reproduce successfully in the laboratory.
▶️Answer/Explanation
Ans: Eliminate a gene artificially; attempt to culture the microbe lacking the gene; if the gene isn’t vital the bacterium will grow and multiply to form a visible colony.
Question:
The Holstein breed of cattle is widely used for milk production. In order to produce milk, each cow must have a calf every year. Holsteins have a black head and black coat with white patches.
Hereford cattle are reared for beef. They have an all-white head and a red coat with no white patches. Many Holstein cattle are artificially inseminated with semen from Hereford bulls. The progeny all have a white head, a black coat and no white patches. Discuss the possible outcome if these Holstein-Hereford crosses were bred together.
▶️Answer/Explanation
Ans: White head due to a dominant allele so 3:1 ratio of white to coloured head; the expected ratio for coat colour is 3 black: 1 red; 3 no white patches: 1 with white patches; all combinations of these traits are possible assuming that the three genes are unlinked; chance of offspring with a red coat and white patches plus a coloured head is 1 in 64.