8.2.3 - How do these Traits get Expressed?
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Practice Questions
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What is a gene?
💡 Hint: Think about DNA and what it tells cells to do.
Define dominant trait.
💡 Hint: Which trait shows up even if there's only one copy?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What determines whether a trait is dominant or recessive?
💡 Hint: Think about how traits show up in crosses.
True or False: All traits are inherited in a straightforward manner without any modifications.
💡 Hint: Consider what can happen in real-life scenarios. ## Challenge Problems 1. **Problem**: A plant has the genotype of Tt (tall) and is crossed with another Tt plant. What phenotypic ratio will you expect in the offspring? - **Solution**: You would expect a phenotypic ratio of 3 tall: 1 short offspring due to the combinations of TT, Tt, Tt, and tt. - **Hint**: Remember, dominant traits show even when paired with recessive traits. 2. **Problem**: Discuss how environmental factors might alter the expression of a genetic trait. - **Solution**: Environmental factors such as soil quality, water availability, and sunlight can influence plant height by affecting hormone production, which in turn can modulate gene expression. - **Hint**: Think about interactions that affect growth in plants. ---
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Challenge Problems
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A plant has the genotype of Tt (tall) and is crossed with another Tt plant. What phenotypic ratio will you expect in the offspring?
💡 Hint: Remember, dominant traits show even when paired with recessive traits.
Discuss how environmental factors might alter the expression of a genetic trait.
💡 Hint: Think about interactions that affect growth in plants. ---
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