Question

non-mendelian genetics: inquiry task
scenario c: polygenic traits in humans
human height is controlled by at least 12000 different genes. people’s heights range from very
short to very tall, with most people in the middle.

• why do you think height shows a range of values instead of just \tall\ or \short\?
• how would a punnett square for a single gene be useless for predicting height?
• what other human traits do you think might be polygenic?

Explanation:

The problem is about Non - Mendelian Genetics, specifically polygenic traits in humans. The subfield of Natural Science that applies here is Biology, as it deals with the study of living organisms, including human genetics and traits. For the first question, height is polygenic (controlled by many genes) and also influenced by the environment, so it shows a continuous range. A Punnett square for a single gene is useless for height because height is controlled by thousands of genes, not one, so single - gene Punnett squares can't account for the multiple - gene interaction. Other polygenic human traits could be skin color (influenced by multiple genes and environment), eye color (though more complex than simple Mendelian, has multiple genetic factors), and body weight (influenced by multiple genes and environmental factors like diet and exercise).

Answer:

The subfield is Biology (under Natural Science). For the questions: 1. Height is polygenic (many genes) and environmental factors influence it, leading to a range. 2. Height is controlled by ~12000 genes, so a single - gene Punnett square can't model the multiple - gene interaction. 3. Skin color, eye color, body weight are possible polygenic traits.