Practice Inheritance Of Two Genes (4.3) - Principles of Inheritance and Variation

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9 questions

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6 sample questions

Question 1.
What is a dihybrid cross?
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Think of traits like seed color and shape.
Question 2.
Explain what it means for a trait to be dominant.
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What trait might not show if a dominant trait is present?
3Question 3.
What does Mendel's law of independent assortment imply?
- Traits are blended
- Traits are inherited dependently
- Traits assort independently
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Think about how traits can combine from two parents.
4Question 4.
True or False: A trait can be recessive and still appear in the phenotype of an organism.
- True
- False
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Think about when a trait is masked.
Question 5.
A plant with unknown genotype, either TT or Tt, is crossed with a tt plant. What will be the expected genotypic and phenotypic ratios in the offspring?
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Consider both scenarios to find out the outputs.
Question 6.
In a certain dihybrid cross, a RrYy plant is crossed with a RrYy plant. What is the probability of obtaining a homozygous round and yellow seed?
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Look for combinations of R from both parents.

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