Term 1 Week 4 · Three in Four Is a Chance, Not a Count · CG Quarter 1, competency 5
| # | The misconception | Where it shows | What to do |
|---|---|---|---|
| 1 | 3 : 1 means three of every four children | §C2, worksheet ★ | The coins. Ten flips almost never give three and one, and the class's own data is the argument |
| 2 | Dominant means more common in the population | §D, game Round 3 | Extra fingers is dominant and rare. Blood type O is recessive and the most common here |
| 3 | The next one is due | Exit ticket 2 | Each conception is independent. The coin does not remember, and neither does meiosis |
| 4 | Tt is halfway between TT and tt | Worksheet C | For a dominant/recessive pair there is no in-between. Blending is a different pattern |
| 5 | The dominant allele destroys or weakens the recessive one | §C4 | It is unchanged and can be passed on whole. That is why traits reappear after a generation |
| 6 | Recessive means rare, weak or harmful | §D | Three separate words for three separate things. Recessive is only about which one shows |
| 7 | The square predicts what will happen | §C3 | It predicts a probability. With 400 seeds that is nearly the same thing; with 4, it is not |