Question

16. Answer the following questions:

a. In what way do the percentages of yellow leaves vary between dishes on Day 2? How do you account for this

difference?

b. Compare the percentage of yellow seedlings in dish 2 on day 2 with the percentage on day 4. What is the

difference? What experimental variable accounts for this difference?

c. How can you account for the difference between the seedlings in dish 1?

d. Is the yellow color genetically or environmentally controlled?

e. How can environmental factors affect inheritance? (Use human height as an example. )

Answer 1

a. The percentages of yellow leaves in dish 2 on day 2 vary from the percentages in the other dishes. This difference may be due to variations in the experimental conditions or variables, such as the type of soil, the amount of water or sunlight, or the presence of pests or diseases.

b. The percentage of yellow seedlings in dish 2 on day 2 is higher than the percentage on day 4. The difference may be due to changes in the experimental conditions or variables over time, such as the availability of nutrients or the presence of stressors.

c. The difference between the seedlings in dish 1 may be due to variations in the experimental conditions or variables, such as the type of soil, the amount of water or sunlight, or the presence of pests or diseases.

d. The yellow color of the seedlings may be genetically controlled, meaning that it is determined by the genetic makeup of the seedlings. Alternatively, the yellow color may be environmentally controlled, meaning that it is influenced by external factors such as the availability of nutrients or the presence of stressors.

e. Environmental factors can affect inheritance by influencing the expression of genetic traits. For example, if a person is exposed to poor nutrition or other stressors during development, this may affect their physical growth and lead to differences in height compared to individuals who are not exposed to these factors.