Which do you think has more influence on a person’s weight: genetics, upbringing, or the environment?

Which do you think has more influence on a person’s weight: genetics, upbringing, or the environment? Why do you think this is so? Is a person’s weight a single genetic trait, a qualitative trait, or a quantitative trait? Discuss and support your response with examples.
Your answer must be at least 200 words in length.

Describe the difference between artificial selection of organisms and genetically modifying organisms. Include examples that support your response.
Your answer must be at least 75 words in length.