A class is studying how genetic information is passed from parents to offspring. Use the inheritance model below.
In the model, each parent passes one "information card" for fur color to each offspring.
Which statement about inheritance is supported by the model and the evidence shown?
- The offspring's fur color comes only from the parent with the darker fur because that parent's trait is stronger.
- The offspring's fur color is inherited because each offspring receives genetic information from both parents. (correct answer)
- The offspring's fur color is chosen by the offspring after it is born based on what color would help it survive.
- The offspring's fur color is caused only by the environment, so parent traits do not provide evidence.
Explanation: This question tests understanding of how traits are passed from parents to offspring through genetic information. Genetic information is inherited from both parents, not just one, which explains why offspring can have traits from either or both parents. The model shows arrows from both parents to offspring, representing the passing of genetic information for fur color. To check your answer, look for the option that correctly describes inheritance from both parents. A common misconception is that only the "stronger" or darker trait gets passed on, but inheritance involves contributions from both parents. This principle of inheritance from both parents explains why we see variation in traits within families and populations.