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Questions and Answers
What is the phenotypic ratio of tall to dwarf plants in the F2 generation?
What is the phenotypic ratio of tall to dwarf plants in the F2 generation?
- 3:1 (correct)
- 1:2
- 1:3
- 2:1
What are the genotypes present in the F1 generation?
What are the genotypes present in the F1 generation?
- Tt and tt
- Tt only (correct)
- TT and tt
- TT, Tt, and tt
What are the genotypic ratios in the F2 generation of a monohybrid cross?
What are the genotypic ratios in the F2 generation of a monohybrid cross?
- 2:1
- 3:1
- 1:2:1 (correct)
- 1:1
Which of the following statements is true regarding the F1 generation?
Which of the following statements is true regarding the F1 generation?
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What does Mendel's law indicate about the offspring of a monohybrid cross?
What does Mendel's law indicate about the offspring of a monohybrid cross?
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Study Notes
Monohybrid Cross: Parental Generation
- Tall (TT) and dwarf (tt) plants were crossed as the parental generation
- Tall plants are homozygous dominant (TT)
- Dwarf plants are homozygous recessive (tt)
Monohybrid Cross: F1 Generation
- F1 generation had all Tt genotypes
- All F1 generation plants were tall
Monohybrid Cross: F2 Generation
- F1 generation was self-pollinated
- F2 generation produced a 3:1 phenotype ratio of tall to dwarf plants
- F2 generation produced a 1:2:1 genotype ratio of TT:Tt:tt
Monohybrid Cross: Checkerboard
- The checkerboard illustrates the genotypes produced from the F1 self-pollination
- TT, Tt, and tt genotypes are shown in the checkerboard
Mendel's Law of Segregation
- This experiment demonstrates Mendel's Law of Segregation
- The parents' alleles separate during gamete formation, ensuring that offspring inherit one allele from each parent.
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Description
Explore the principles of monohybrid crosses through the example of tall and dwarf plants. Understand the genotypic and phenotypic ratios in the F1 and F2 generations, and how Mendel's Law of Segregation applies to this genetic experiment.
