Practice Law Of Dominance (1.2.3.1) - Basic Biology

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6 sample questions

Question 1.
What does it mean if a plant is heterozygous for a trait?
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Consider how alleles can differ.
Question 2.
What phenotype will a TT plant exhibit?
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Think about the importance of the T allele.
3Question 3.
What is the Law of Dominance?
- A law stating recessive traits are always expressed.
- A principle that states dominant alleles mask recessive ones.
- A rule about polygenic traits.
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Remember the pattern of alleles in Mendel's experiments.
4Question 4.
True or False: In a heterozygous genotype, the recessive allele will always be expressed.
- True
- False
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Think about which allele shows up in dominant versus recessive situations.
Question 5.
A plant with genotype Rr is crossed with rr. What will the possible phenotypes and their ratios be in the offspring?
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Use a Punnett square to visualize the crosses.
Question 6.
Two pea plants, both heterozygous (Tt), are crossed. What is the probability of producing a dwarf plant?
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Draw a Punnett square to see all possible outcomes clearly.

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