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What was the purpose of Mendel's dihybrid cross experiment?
What was the purpose of Mendel's dihybrid cross experiment?
To determine if the pattern of inheritance for one trait had any impact on the pattern of inheritance for another trait.
What was the genotype of the true-breeding plants that produced yellow, round seeds in Mendel's experiment?
What was the genotype of the true-breeding plants that produced yellow, round seeds in Mendel's experiment?
YYRR
What was the ratio of offspring displaying recessive forms of both traits in Mendel's dihybrid cross experiment?
What was the ratio of offspring displaying recessive forms of both traits in Mendel's dihybrid cross experiment?
1
What is the law of independent assortment, as discovered by Mendel?
What is the law of independent assortment, as discovered by Mendel?
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What was the phenotype of the F1 generation plants in Mendel's dihybrid cross experiment?
What was the phenotype of the F1 generation plants in Mendel's dihybrid cross experiment?
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How many offspring displayed 1 recessive form of a trait and a dominant form of the second trait in Mendel's dihybrid cross experiment?
How many offspring displayed 1 recessive form of a trait and a dominant form of the second trait in Mendel's dihybrid cross experiment?
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What was the significance of the 9:3:3:1 ratio observed in Mendel's dihybrid cross experiment?
What was the significance of the 9:3:3:1 ratio observed in Mendel's dihybrid cross experiment?
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What is the implication of the law of independent assortment on our understanding of genetic inheritance?
What is the implication of the law of independent assortment on our understanding of genetic inheritance?
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What was the purpose of Mendel's F2 generation in his dihybrid cross experiment?
What was the purpose of Mendel's F2 generation in his dihybrid cross experiment?
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What does the law of independent assortment suggest about the interaction between different genes during gamete formation?
What does the law of independent assortment suggest about the interaction between different genes during gamete formation?
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Study Notes
Mendel's Dihybrid Cross
- Mendel designed experiments to determine if the pattern of inheritance for one trait affects another trait
- He used true-breeding plants with two different traits, making it a dihybrid cross
- The cross involved plants with yellow, round seeds (YYRR) and plants with green, wrinkled seeds (yyrr)
F1 Generation
- All F1 generation plants displayed dominant forms of each trait, resulting in yellow, round seeds
F2 Generation
- Mendel let the F1 plants self-fertilize, causing recessive forms of each trait to reappear
- The same ratio of 9:3:3:1 was always obtained, regardless of the two traits followed
Ratio Explanation
- For every 1 offspring with recessive forms of both traits (yyrr), there are:
- 3 offspring with 1 recessive form of a trait and a dominant form of the second trait (Y__rr)
- 3 offspring with the opposite combination of recessive and dominant forms of the two traits (yyR__)
- 9 offspring displaying dominant forms of both traits (Y__R__)
Law of Independent Assortment
- During gamete formation, the 2 alleles for one gene segregate or assort independently of the alleles for the other gene
- The inheritance of one trait has no influence on the inheritance of another trait
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Description
This quiz explores Mendel's experiment on dihybrid cross, where he investigated the inheritance pattern of two traits. He crossed true-breeding plants with different traits to observe the outcome. How much do you know about this experiment?
