PT 2 OF 15 POINT QUIZ 7. Wild foxes are aggressive and unfriendly toward humans. However, Russian scientists have worked since the 1950s to breed a domesticated version of the silver fox. Each year, the scientists choose the tamest foxes to mate together. Gradually, the foxes are becoming more like dogs. They are much more friendly and playful than wild foxes. What technique is used to increase desirable traits in domesticated animals through breeding?
A. natural selection
B. genome selection
C. cloning selection
D. artificial selection

8.Zika fever is a viral disease. The virus is transmitted by Aedes aegypti mosquito bites. Most people have only mild symptoms from Zika. However, Zika can cause pregnant woman to have babies with serious birth defects. A British company is working to reduce mosquito populations through genetic engineering. The company has genetically modified A. aegypti mosquitoes so their offspring die before they mature. Tests in Brazil showed that local A. aegypti populations dropped 80-90% after the genetically modified mosquitoes were released. Which of the following statements is true of all genetically engineered organisms?
A. They have a genome that is identical to their parents’ genome.
B. They are made using half the genomes of two different species.
C. They contain genes transferred from another organism.
D. They are produced by breeding only the individuals with desired traits.

9. Genetic technologies are in the news now almost every day. Scientists, engineers, animal breeders, farmers, doctors, and police use genetic techniques to answer questions, grow food, prevent illness, and solve crimes. Read each sentence in the right column that describes a problem that can be solved with genetic technology. Match each genetic technology on the top with an example of a problem it can solve in the left column.
organism cloning genome sequencing gene therapy DNA fingerprinting
A zoo needs to know which of three male lions fathered a litter of cubs.
A racehorse owner wants to make an exact copy of his champion horse.
Scientists discover a new species of mouse and want to classify it accurately.
A child is born with a faulty gene that causes a serious disease.
A zoo needs to know which of three male lions fathered a litter of cubs.
A racehorse owner wants to make an exact copy of his champion horse.
Scientists discover a new species of mouse and want to classify it accurately.
A child is born with a faulty gene that causes a serious disease.

10. Tay-Sachs disease is a recessive genetic condition that damages the brain and causes early death. Miriam had an uncle who died of the disease at age 2. Miriam is considering having a child. She wants to have her DNA tested for the Tay-Sachs gene. How can genome sequencing help Miriam decide whether to have a child?
A. Genome sequencing will tell Miriam whether she is a carrier of the Tay-Sachs gene.
B. Genome sequencing will tell Miriam that her children will have Tay-Sachs disease.
C. Genome sequencing will allow Miriam’s children to get gene therapy for TaySachs disease.
D. Genome sequencing will tell Miriam how closely-related she will be to her children.