Artificial Selection CFA

The table displays data about the presence of certain traits in a population of chickens over several generations. The data provides evidence that best supports the claim that these chickens are being bred for which characteristic?

• Fewer white feathers

• Larger bodies

• Shorter beaks

• More tail feathers

Which of the following is required for a trait to become more common over time in a population?

• There must be many varieties of the trait in the population.

• The trait must allow members of the population to eat only some kinds of food.

• The trait must give individuals an advantage in producing offspring that survive.

• The trait must be the result of an immediate change in the environment.

Which of the following best describes how humans were able to engineer this breed of dog?

• For many generations, these dogs were allowed to run freely in large open fields.

• Dogs that were slower than others were given exercise and trained to run fast.

• Over many years, all the dogs were fed diets high in protein and vitamins.

• In every generation, only those dogs with the desired traits were allowed to reproduce.

Which of the following best describes artificial selection as compared to natural selection?

• In artificial selection, the passing on of traits is determined by survival advantages in nature

• In natural selection, the passing on of traits is determined by choices on the part of the organism

• In artificial selection, the passing on of traits is determined by human choice

• In natural selection, the passing on of traits is determined by human choice

In gene therapy, DNA which encodes a healthy, functional gene is used to replace a mutated gene. This technology will most likely have which of the following results?

• The spread of mutated genes will lead to increased risk of disease.

• Diseases caused by mutated genes will have new treatments.

• Traditional medications will no longer be effective at treating disease.

• Diseases that are not caused by mutated genes will become more common.